SingleFile/extension/ui/bg/ui-options.js

/*
 * Copyright 2010-2020 Gildas Lormeau
 * contact : gildas.lormeau <at> gmail.com
 * 
 * This file is part of SingleFile.
 *
 *   The code in this file is free software: you can redistribute it and/or 
 *   modify it under the terms of the GNU Affero General Public License 
 *   (GNU AGPL) as published by the Free Software Foundation, either version 3
 *   of the License, or (at your option) any later version.
 * 
 *   The code in this file is distributed in the hope that it will be useful, 
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of 
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero 
 *   General Public License for more details.
 *
 *   As additional permission under GNU AGPL version 3 section 7, you may 
 *   distribute UNMODIFIED VERSIONS OF THIS file without the copy of the GNU 
 *   AGPL normally required by section 4, provided you include this license 
 *   notice and a URL through which recipients can access the Corresponding 
 *   Source.
 */

/* global browser, window, document, localStorage, FileReader, location, fetch, TextDecoder, DOMParser, HTMLElement */

(async () => {

	const HELP_ICON_URL = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAABIUlEQVQ4y+2TsarCMBSGvxTBRdqiUZAWOrhJB9EXcPKFfCvfQYfulUKHDqXg4CYUJSioYO4mSDX3ttzt3n87fMlHTpIjlsulxpDZbEYYhgghSNOUOI5Ny2mZYBAELBYLer0eAJ7ncTweKYri4x7LJJRS0u12n7XrukgpjSc0CpVSXK/XZ32/31FKNW85z3PW6zXT6RSAJEnIsqy5UGvNZrNhu90CcDqd+C6tT6J+v//2Th+PB2VZ1hN2Oh3G4zGTyQTbtl/YbrdjtVpxu91+Ljyfz0RRhG3bzOfzF+Y4TvNXvlwuaK2pE4tfzr/wzwsty0IIURlL0998KxRCMBqN8H2/wlzXJQxD2u12vVkeDoeUZUkURRU+GAw4HA7s9/sK+wK6CWHasQ/S/wAAAABJRU5ErkJggg==";
	const HELP_PAGE_PATH = "/extension/ui/pages/help.html";
	const { DEFAULT_PROFILE_NAME, DISABLED_PROFILE_NAME, CURRENT_PROFILE_NAME } = await browser.runtime.sendMessage({ method: "config.getConstants" });
	const removeHiddenElementsLabel = document.getElementById("removeHiddenElementsLabel");
	const removeUnusedStylesLabel = document.getElementById("removeUnusedStylesLabel");
	const removeUnusedFontsLabel = document.getElementById("removeUnusedFontsLabel");
	const removeFramesLabel = document.getElementById("removeFramesLabel");
	const removeImportsLabel = document.getElementById("removeImportsLabel");
	const removeScriptsLabel = document.getElementById("removeScriptsLabel");
	const saveRawPageLabel = document.getElementById("saveRawPageLabel");
	const saveToClipboardLabel = document.getElementById("saveToClipboardLabel");
	const addProofLabel = document.getElementById("addProofLabel");
	const saveToGDriveLabel = document.getElementById("saveToGDriveLabel");
	const compressHTMLLabel = document.getElementById("compressHTMLLabel");
	const compressCSSLabel = document.getElementById("compressCSSLabel");
	const loadDeferredImagesLabel = document.getElementById("loadDeferredImagesLabel");
	const loadDeferredImagesMaxIdleTimeLabel = document.getElementById("loadDeferredImagesMaxIdleTimeLabel");
	const addMenuEntryLabel = document.getElementById("addMenuEntryLabel");
	const filenameTemplateLabel = document.getElementById("filenameTemplateLabel");
	const shadowEnabledLabel = document.getElementById("shadowEnabledLabel");
	const setMaxResourceSizeLabel = document.getElementById("setMaxResourceSizeLabel");
	const maxResourceSizeLabel = document.getElementById("maxResourceSizeLabel");
	const confirmFilenameLabel = document.getElementById("confirmFilenameLabel");
	const filenameConflictActionLabel = document.getElementById("filenameConflictActionLabel");
	const filenameConflictActionUniquifyLabel = document.getElementById("filenameConflictActionUniquifyLabel");
	const filenameConflictActionOverwriteLabel = document.getElementById("filenameConflictActionOverwriteLabel");
	const filenameConflictActionPromptLabel = document.getElementById("filenameConflictActionPromptLabel");
	const removeAudioLabel = document.getElementById("removeAudioLabel");
	const removeVideoLabel = document.getElementById("removeVideoLabel");
	const displayInfobarLabel = document.getElementById("displayInfobarLabel");
	const displayStatsLabel = document.getElementById("displayStatsLabel");
	const backgroundSaveLabel = document.getElementById("backgroundSaveLabel");
	const autoSaveDelayLabel = document.getElementById("autoSaveDelayLabel");
	const autoSaveLoadLabel = document.getElementById("autoSaveLoadLabel");
	const autoSaveUnloadLabel = document.getElementById("autoSaveUnloadLabel");
	const autoSaveLoadOrUnloadLabel = document.getElementById("autoSaveLoadOrUnloadLabel");
	const autoSaveRepeatLabel = document.getElementById("autoSaveRepeatLabel");
	const autoSaveRepeatDelayLabel = document.getElementById("autoSaveRepeatDelayLabel");
	const removeAlternativeFontsLabel = document.getElementById("removeAlternativeFontsLabel");
	const removeAlternativeImagesLabel = document.getElementById("removeAlternativeImagesLabel");
	const removeAlternativeMediasLabel = document.getElementById("removeAlternativeMediasLabel");
	const saveCreatedBookmarksLabel = document.getElementById("saveCreatedBookmarksLabel");
	const replaceBookmarkURLLabel = document.getElementById("replaceBookmarkURLLabel");
	const titleLabel = document.getElementById("titleLabel");
	const userInterfaceLabel = document.getElementById("userInterfaceLabel");
	const filenameLabel = document.getElementById("filenameLabel");
	const htmlContentLabel = document.getElementById("htmlContentLabel");
	const imagesLabel = document.getElementById("imagesLabel");
	const stylesheetsLabel = document.getElementById("stylesheetsLabel");
	const fontsLabel = document.getElementById("fontsLabel");
	const otherResourcesLabel = document.getElementById("otherResourcesLabel");
	const autoSaveLabel = document.getElementById("autoSaveLabel");
	const autoSettingsLabel = document.getElementById("autoSettingsLabel");
	const autoSettingsUrlLabel = document.getElementById("autoSettingsUrlLabel");
	const autoSettingsProfileLabel = document.getElementById("autoSettingsProfileLabel");
	const autoSettingsAutoSaveProfileLabel = document.getElementById("autoSettingsAutoSaveProfileLabel");
	const showAllProfilesLabel = document.getElementById("showAllProfilesLabel");
	const showAutoSaveProfileLabel = document.getElementById("showAutoSaveProfileLabel");
	const groupDuplicateImagesLabel = document.getElementById("groupDuplicateImagesLabel");
	const confirmInfobarLabel = document.getElementById("confirmInfobarLabel");
	const autoCloseLabel = document.getElementById("autoCloseLabel");
	const openEditorLabel = document.getElementById("openEditorLabel");
	const autoOpenEditorLabel = document.getElementById("autoOpenEditorLabel");
	const infobarTemplateLabel = document.getElementById("infobarTemplateLabel");
	const includeInfobarLabel = document.getElementById("includeInfobarLabel");
	const miscLabel = document.getElementById("miscLabel");
	const helpLabel = document.getElementById("helpLabel");
	const synchronizeLabel = document.getElementById("synchronizeLabel");
	const addProfileButton = document.getElementById("addProfileButton");
	const deleteProfileButton = document.getElementById("deleteProfileButton");
	const renameProfileButton = document.getElementById("renameProfileButton");
	const resetButton = document.getElementById("resetButton");
	const exportButton = document.getElementById("exportButton");
	const importButton = document.getElementById("importButton");
	const fileInput = document.getElementById("fileInput");
	const profileNamesInput = document.getElementById("profileNamesInput");
	const removeHiddenElementsInput = document.getElementById("removeHiddenElementsInput");
	const removeUnusedStylesInput = document.getElementById("removeUnusedStylesInput");
	const removeUnusedFontsInput = document.getElementById("removeUnusedFontsInput");
	const removeFramesInput = document.getElementById("removeFramesInput");
	const removeImportsInput = document.getElementById("removeImportsInput");
	const removeScriptsInput = document.getElementById("removeScriptsInput");
	const saveRawPageInput = document.getElementById("saveRawPageInput");
	const saveToClipboardInput = document.getElementById("saveToClipboardInput");
	const addProofInput = document.getElementById("addProofInput");
	const saveToGDriveInput = document.getElementById("saveToGDriveInput");
	const compressHTMLInput = document.getElementById("compressHTMLInput");
	const compressCSSInput = document.getElementById("compressCSSInput");
	const loadDeferredImagesInput = document.getElementById("loadDeferredImagesInput");
	const loadDeferredImagesMaxIdleTimeInput = document.getElementById("loadDeferredImagesMaxIdleTimeInput");
	const contextMenuEnabledInput = document.getElementById("contextMenuEnabledInput");
	const filenameTemplateInput = document.getElementById("filenameTemplateInput");
	const shadowEnabledInput = document.getElementById("shadowEnabledInput");
	const maxResourceSizeInput = document.getElementById("maxResourceSizeInput");
	const maxResourceSizeEnabledInput = document.getElementById("maxResourceSizeEnabledInput");
	const confirmFilenameInput = document.getElementById("confirmFilenameInput");
	const filenameConflictActionInput = document.getElementById("filenameConflictActionInput");
	const removeAudioSrcInput = document.getElementById("removeAudioSrcInput");
	const removeVideoSrcInput = document.getElementById("removeVideoSrcInput");
	const displayInfobarInput = document.getElementById("displayInfobarInput");
	const displayStatsInput = document.getElementById("displayStatsInput");
	const backgroundSaveInput = document.getElementById("backgroundSaveInput");
	const autoSaveDelayInput = document.getElementById("autoSaveDelayInput");
	const autoSaveLoadInput = document.getElementById("autoSaveLoadInput");
	const autoSaveUnloadInput = document.getElementById("autoSaveUnloadInput");
	const autoSaveLoadOrUnloadInput = document.getElementById("autoSaveLoadOrUnloadInput");
	const autoSaveRepeatInput = document.getElementById("autoSaveRepeatInput");
	const autoSaveRepeatDelayInput = document.getElementById("autoSaveRepeatDelayInput");
	const removeAlternativeFontsInput = document.getElementById("removeAlternativeFontsInput");
	const removeAlternativeImagesInput = document.getElementById("removeAlternativeImagesInput");
	const removeAlternativeMediasInput = document.getElementById("removeAlternativeMediasInput");
	const saveCreatedBookmarksInput = document.getElementById("saveCreatedBookmarksInput");
	const replaceBookmarkURLInput = document.getElementById("replaceBookmarkURLInput");
	const groupDuplicateImagesInput = document.getElementById("groupDuplicateImagesInput");
	const infobarTemplateInput = document.getElementById("infobarTemplateInput");
	const includeInfobarInput = document.getElementById("includeInfobarInput");
	const confirmInfobarInput = document.getElementById("confirmInfobarInput");
	const autoCloseInput = document.getElementById("autoCloseInput");
	const openEditorInput = document.getElementById("openEditorInput");
	const autoOpenEditorInput = document.getElementById("autoOpenEditorInput");
	const expandAllButton = document.getElementById("expandAllButton");
	const rulesDeleteAllButton = document.getElementById("rulesDeleteAllButton");
	const ruleUrlInput = document.getElementById("ruleUrlInput");
	const ruleProfileInput = document.getElementById("ruleProfileInput");
	const ruleAutoSaveProfileInput = document.getElementById("ruleAutoSaveProfileInput");
	const ruleEditProfileInput = document.getElementById("ruleEditProfileInput");
	const ruleEditAutoSaveProfileInput = document.getElementById("ruleEditAutoSaveProfileInput");
	const ruleAddButton = document.getElementById("ruleAddButton");
	const rulesElement = document.querySelector(".rules-table");
	const rulesContainerElement = document.querySelector(".rules-table-container");
	const ruleEditUrlInput = document.getElementById("ruleEditUrlInput");
	const ruleEditButton = document.getElementById("ruleEditButton");
	const createURLElement = rulesElement.querySelector(".rule-create");
	const showAllProfilesInput = document.getElementById("showAllProfilesInput");
	const showAutoSaveProfileInput = document.getElementById("showAutoSaveProfileInput");
	const synchronizeInput = document.getElementById("synchronizeInput");
	const resetAllButton = document.getElementById("resetAllButton");
	const resetCurrentButton = document.getElementById("resetCurrentButton");
	const resetCancelButton = document.getElementById("resetCancelButton");
	const confirmButton = document.getElementById("confirmButton");
	const cancelButton = document.getElementById("cancelButton");
	const promptInput = document.getElementById("promptInput");
	const promptCancelButton = document.getElementById("promptCancelButton");
	const promptConfirmButton = document.getElementById("promptConfirmButton");

	let sidePanelDisplay;
	if (location.href.endsWith("#side-panel")) {
		sidePanelDisplay = true;
		document.querySelector(".options-title").remove();
		document.documentElement.classList.add("side-panel");
	}
	browser.runtime.onMessage.addListener(message => {
		if (message.method == "options.refresh" || (message.method == "options.refreshPanel" && sidePanelDisplay)) {
			refresh(message.profileName);
		}
	});
	let pendingSave = Promise.resolve();
	let autoSaveProfileChanged;
	ruleProfileInput.onchange = () => {
		if (!autoSaveProfileChanged && ruleProfileInput.value != CURRENT_PROFILE_NAME) {
			ruleAutoSaveProfileInput.value = ruleProfileInput.value;
		}
	};
	ruleAutoSaveProfileInput.onchange = () => {
		autoSaveProfileChanged = true;
	};
	rulesDeleteAllButton.addEventListener("click", async () => {
		if (await confirm(browser.i18n.getMessage("optionsDeleteDisplayedRulesConfirm"), "flex-end")) {
			await browser.runtime.sendMessage({ method: "config.deleteRules", profileName: !showAllProfilesInput.checked && profileNamesInput.value });
			await refresh();
			await refreshExternalComponents();
		}
	}, false);
	createURLElement.onsubmit = async event => {
		event.preventDefault();
		try {
			await browser.runtime.sendMessage({ method: "config.addRule", url: ruleUrlInput.value, profileName: ruleProfileInput.value, autoSaveProfileName: ruleAutoSaveProfileInput.value });
		} catch (error) {
			// ignored
		}
		ruleUrlInput.value = "";
		ruleProfileInput.value = ruleAutoSaveProfileInput.value = DEFAULT_PROFILE_NAME;
		autoSaveProfileChanged = false;
		await refresh();
		await refreshExternalComponents();
		ruleUrlInput.focus();
	};
	ruleUrlInput.onclick = ruleUrlInput.onkeyup = ruleUrlInput.onchange = async () => {
		ruleAddButton.disabled = !ruleUrlInput.value;
		const rules = await browser.runtime.sendMessage({ method: "config.getRules" });
		if (rules.find(rule => rule.url == ruleUrlInput.value)) {
			ruleAddButton.disabled = true;
		}
	};
	ruleEditUrlInput.onclick = ruleEditUrlInput.onkeyup = ruleEditUrlInput.onchange = async () => {
		ruleEditButton.disabled = !ruleEditUrlInput.value;
		const rules = await browser.runtime.sendMessage({ method: "config.getRules" });
		if (rules.find(rule => rule.url == ruleEditUrlInput.value)) {
			ruleEditButton.disabled = true;
		}
	};
	if (getLocalStorageItem("optionShowAutoSaveProfile")) {
		showAutoSaveProfileInput.checked = true;
		rulesContainerElement.classList.remove("compact");
	}
	showAutoSaveProfileInput.addEventListener("click", () => {
		if (showAutoSaveProfileInput.checked) {
			setLocalStorageItem("optionShowAutoSaveProfile", 1);
			rulesContainerElement.classList.remove("compact");
		} else {
			removeLocalStorageItem("optionShowAutoSaveProfile");
			rulesContainerElement.classList.add("compact");
		}
	}, false);
	if (getLocalStorageItem("optionShowAllProfiles")) {
		showAllProfilesInput.checked = true;
	}
	showAllProfilesInput.addEventListener("click", () => {
		if (showAllProfilesInput.checked) {
			setLocalStorageItem("optionShowAllProfiles", 1);
		} else {
			removeLocalStorageItem("optionShowAllProfiles");
		}
	}, false);
	addProfileButton.addEventListener("click", async () => {
		const profileName = await prompt(browser.i18n.getMessage("profileAddPrompt"), "flex-start");
		if (profileName) {
			try {
				await browser.runtime.sendMessage({ method: "config.createProfile", profileName, fromProfileName: profileNamesInput.value });
			} catch (error) {
				// ignored
			}
			if (sidePanelDisplay) {
				await refresh();
			} else {
				await refresh(profileName);
			}
			await refreshExternalComponents();
		}
	}, false);
	deleteProfileButton.addEventListener("click", async () => {
		if (await confirm(browser.i18n.getMessage("profileDeleteConfirm"), "flex-start")) {
			try {
				await browser.runtime.sendMessage({ method: "config.deleteProfile", profileName: profileNamesInput.value });
			} catch (error) {
				// ignored
			}
			profileNamesInput.value = null;
			await refresh();
			await refreshExternalComponents();
		}
	}, false);
	renameProfileButton.addEventListener("click", async () => {
		const profileName = await prompt(browser.i18n.getMessage("profileRenamePrompt"), "flex-start", profileNamesInput.value);
		if (profileName) {
			try {
				await browser.runtime.sendMessage({ method: "config.renameProfile", profileName: profileNamesInput.value, newProfileName: profileName });
			} catch (error) {
				// ignored
			}
			await refresh(profileName);
			await refreshExternalComponents();
		}
	}, false);
	resetButton.addEventListener("click", async () => {
		const choice = await reset();
		if (choice) {
			if (choice == "all") {
				await browser.runtime.sendMessage({ method: "config.resetProfiles" });
				await refresh(DEFAULT_PROFILE_NAME);
				await refreshExternalComponents();
			}
			if (choice == "current") {
				await browser.runtime.sendMessage({ method: "config.resetProfile", profileName: profileNamesInput.value });
				await refresh();
				await refreshExternalComponents();
			}
			await update();
		}
	}, false);
	exportButton.addEventListener("click", async () => {
		await browser.runtime.sendMessage({ method: "config.exportConfig" });
	}, false);
	importButton.addEventListener("click", () => {
		fileInput.onchange = async () => {
			if (fileInput.files.length) {
				const reader = new FileReader();
				reader.readAsText(fileInput.files[0]);
				const serializedConfig = await new Promise((resolve, reject) => {
					reader.addEventListener("load", () => resolve(reader.result), false);
					reader.addEventListener("error", reject, false);
				});
				const config = JSON.parse(serializedConfig);
				await browser.runtime.sendMessage({ method: "config.importConfig", config });
				await refresh(DEFAULT_PROFILE_NAME);
				await refreshExternalComponents();
				fileInput.value = "";
			}
		};
		fileInput.click();
	}, false);
	autoSaveUnloadInput.addEventListener("click", async () => {
		if (!autoSaveLoadInput.checked && !autoSaveUnloadInput.checked) {
			autoSaveLoadOrUnloadInput.checked = true;
		}
	}, false);
	autoSaveLoadInput.addEventListener("click", async () => {
		if (!autoSaveLoadInput.checked && !autoSaveUnloadInput.checked) {
			autoSaveLoadOrUnloadInput.checked = true;
		}
	}, false);
	autoSaveLoadOrUnloadInput.addEventListener("click", async () => {
		if (autoSaveLoadOrUnloadInput.checked) {
			autoSaveUnloadInput.checked = autoSaveLoadInput.checked = false;
		} else {
			autoSaveUnloadInput.checked = false;
			autoSaveLoadInput.checked = true;
		}
	}, false);
	expandAllButton.addEventListener("click", () => {
		if (expandAllButton.className) {
			expandAllButton.className = "";
		} else {
			expandAllButton.className = "opened";
		}
		document.querySelectorAll("details").forEach(detailElement => detailElement.open = Boolean(expandAllButton.className));
	}, false);
	removeScriptsInput.addEventListener("click", () => {
		if (!removeScriptsInput.checked) {
			removeHiddenElementsInput.checked = false;
			removeUnusedStylesInput.checked = false;
		}
	}, false);
	saveCreatedBookmarksInput.addEventListener("click", saveCreatedBookmarks, false);
	saveToGDriveInput.addEventListener("click", async () => {
		if (!saveToGDriveInput.checked) {
			await browser.runtime.sendMessage({ method: "downloads.disableGDrive" });
		}
	}, false);
	addProofInput.addEventListener("click", async () => {
		if (addProofInput.checked) {
			addProofInput.checked = false;
			if (await confirm(browser.i18n.getMessage("optionsAddProofConfirm"))) {
				addProofInput.checked = true;
			}
			await update();
		}
	});
	synchronizeInput.checked = (await browser.runtime.sendMessage({ method: "config.isSync" })).sync;
	synchronizeInput.addEventListener("click", async () => {
		if (synchronizeInput.checked) {
			await browser.runtime.sendMessage({ method: "config.enableSync" });
			await refresh(DEFAULT_PROFILE_NAME);
		} else {
			await browser.runtime.sendMessage({ method: "config.disableSync" });
			await refresh();
		}
	}, false);
	document.body.onchange = async event => {
		let target = event.target;
		if (target != ruleUrlInput &&
			target != ruleProfileInput &&
			target != ruleAutoSaveProfileInput &&
			target != ruleEditUrlInput &&
			target != ruleEditProfileInput &&
			target != ruleEditAutoSaveProfileInput &&
			target != showAutoSaveProfileInput &&
			target != saveCreatedBookmarksInput) {
			if (target != profileNamesInput && target != showAllProfilesInput) {
				await update();
			}
			if (target == profileNamesInput) {
				await refresh(profileNamesInput.value);
				if (sidePanelDisplay) {
					const tabsData = await browser.runtime.sendMessage({ method: "tabsData.get" });
					tabsData.profileName = profileNamesInput.value;
					await browser.runtime.sendMessage({ method: "tabsData.set", tabsData: tabsData });
					await browser.runtime.sendMessage({ method: "ui.refreshMenu" });
				}
			} else {
				if (target == contextMenuEnabledInput) {
					await browser.runtime.sendMessage({ method: "ui.refreshMenu" });
				}
				if (target == openEditorInput) {
					await browser.runtime.sendMessage({ method: "ui.refreshMenu" });
				}
				await refresh();
			}
		}
	};
	addProfileButton.title = browser.i18n.getMessage("profileAddButtonTooltip");
	deleteProfileButton.title = browser.i18n.getMessage("profileDeleteButtonTooltip");
	renameProfileButton.title = browser.i18n.getMessage("profileRenameButtonTooltip");
	removeHiddenElementsLabel.textContent = browser.i18n.getMessage("optionRemoveHiddenElements");
	removeUnusedStylesLabel.textContent = browser.i18n.getMessage("optionRemoveUnusedStyles");
	removeUnusedFontsLabel.textContent = browser.i18n.getMessage("optionRemoveUnusedFonts");
	removeFramesLabel.textContent = browser.i18n.getMessage("optionRemoveFrames");
	removeImportsLabel.textContent = browser.i18n.getMessage("optionRemoveImports");
	removeScriptsLabel.textContent = browser.i18n.getMessage("optionRemoveScripts");
	saveRawPageLabel.textContent = browser.i18n.getMessage("optionSaveRawPage");
	saveToClipboardLabel.textContent = browser.i18n.getMessage("optionSaveToClipboard");
	addProofLabel.textContent = browser.i18n.getMessage("optionAddProof");
	saveToGDriveLabel.textContent = browser.i18n.getMessage("optionSaveToGDrive");
	compressHTMLLabel.textContent = browser.i18n.getMessage("optionCompressHTML");
	compressCSSLabel.textContent = browser.i18n.getMessage("optionCompressCSS");
	loadDeferredImagesLabel.textContent = browser.i18n.getMessage("optionLoadDeferredImages");
	loadDeferredImagesMaxIdleTimeLabel.textContent = browser.i18n.getMessage("optionLoadDeferredImagesMaxIdleTime");
	addMenuEntryLabel.textContent = browser.i18n.getMessage("optionAddMenuEntry");
	filenameTemplateLabel.textContent = browser.i18n.getMessage("optionFilenameTemplate");
	shadowEnabledLabel.textContent = browser.i18n.getMessage("optionDisplayShadow");
	setMaxResourceSizeLabel.textContent = browser.i18n.getMessage("optionSetMaxResourceSize");
	maxResourceSizeLabel.textContent = browser.i18n.getMessage("optionMaxResourceSize");
	confirmFilenameLabel.textContent = browser.i18n.getMessage("optionConfirmFilename");
	filenameConflictActionLabel.textContent = browser.i18n.getMessage("optionFilenameConflictAction");
	filenameConflictActionUniquifyLabel.textContent = browser.i18n.getMessage("optionFilenameConflictActionUniquify");
	filenameConflictActionOverwriteLabel.textContent = browser.i18n.getMessage("optionFilenameConflictActionOverwrite");
	filenameConflictActionPromptLabel.textContent = browser.i18n.getMessage("optionFilenameConflictActionPrompt");
	removeAudioLabel.textContent = browser.i18n.getMessage("optionRemoveAudio");
	removeVideoLabel.textContent = browser.i18n.getMessage("optionRemoveVideo");
	displayInfobarLabel.textContent = browser.i18n.getMessage("optionDisplayInfobar");
	displayStatsLabel.textContent = browser.i18n.getMessage("optionDisplayStats");
	backgroundSaveLabel.textContent = browser.i18n.getMessage("optionBackgroundSave");
	autoSaveDelayLabel.textContent = browser.i18n.getMessage("optionAutoSaveDelay");
	autoSaveLoadLabel.textContent = browser.i18n.getMessage("optionAutoSaveLoad");
	autoSaveUnloadLabel.textContent = browser.i18n.getMessage("optionAutoSaveUnload");
	autoSaveLoadOrUnloadLabel.textContent = browser.i18n.getMessage("optionAutoSaveLoadOrUnload");
	autoSaveRepeatLabel.textContent = browser.i18n.getMessage("optionAutoSaveRepeat");
	autoSaveRepeatDelayLabel.textContent = browser.i18n.getMessage("optionAutoSaveRepeatDelay");
	removeAlternativeFontsLabel.textContent = browser.i18n.getMessage("optionRemoveAlternativeFonts");
	removeAlternativeImagesLabel.textContent = browser.i18n.getMessage("optionRemoveAlternativeImages");
	removeAlternativeMediasLabel.textContent = browser.i18n.getMessage("optionRemoveAlternativeMedias");
	saveCreatedBookmarksLabel.textContent = browser.i18n.getMessage("optionSaveCreatedBookmarks");
	replaceBookmarkURLLabel.textContent = browser.i18n.getMessage("optionReplaceBookmarkURL");
	groupDuplicateImagesLabel.textContent = browser.i18n.getMessage("optionGroupDuplicateImages");
	titleLabel.textContent = browser.i18n.getMessage("optionsTitle");
	userInterfaceLabel.textContent = browser.i18n.getMessage("optionsUserInterfaceSubTitle");
	filenameLabel.textContent = browser.i18n.getMessage("optionsFileNameSubTitle");
	htmlContentLabel.textContent = browser.i18n.getMessage("optionsHTMLContentSubTitle");
	imagesLabel.textContent = browser.i18n.getMessage("optionsImagesSubTitle");
	stylesheetsLabel.textContent = browser.i18n.getMessage("optionsStylesheetsSubTitle");
	fontsLabel.textContent = browser.i18n.getMessage("optionsFontsSubTitle");
	otherResourcesLabel.textContent = browser.i18n.getMessage("optionsOtherResourcesSubTitle");
	autoSaveLabel.textContent = browser.i18n.getMessage("optionsAutoSaveSubTitle");
	miscLabel.textContent = browser.i18n.getMessage("optionsMiscSubTitle");
	helpLabel.textContent = browser.i18n.getMessage("optionsHelpLink");
	infobarTemplateLabel.textContent = browser.i18n.getMessage("optionInfobarTemplate");
	includeInfobarLabel.textContent = browser.i18n.getMessage("optionIncludeInfobar");
	confirmInfobarLabel.textContent = browser.i18n.getMessage("optionConfirmInfobar");
	autoCloseLabel.textContent = browser.i18n.getMessage("optionAutoClose");
	openEditorLabel.textContent = browser.i18n.getMessage("optionOpenEditor");
	autoOpenEditorLabel.textContent = browser.i18n.getMessage("optionAutoOpenEditor");
	resetButton.textContent = browser.i18n.getMessage("optionsResetButton");
	exportButton.textContent = browser.i18n.getMessage("optionsExportButton");
	importButton.textContent = browser.i18n.getMessage("optionsImportButton");
	resetButton.title = browser.i18n.getMessage("optionsResetTooltip");
	autoSettingsLabel.textContent = browser.i18n.getMessage("optionsAutoSettingsSubTitle");
	autoSettingsUrlLabel.textContent = browser.i18n.getMessage("optionsAutoSettingsUrl");
	autoSettingsProfileLabel.textContent = browser.i18n.getMessage("optionsAutoSettingsProfile");
	autoSettingsAutoSaveProfileLabel.textContent = browser.i18n.getMessage("optionsAutoSettingsAutoSaveProfile");
	ruleAddButton.title = browser.i18n.getMessage("optionsAddRuleTooltip");
	ruleEditButton.title = browser.i18n.getMessage("optionsValidateChangesTooltip");
	rulesDeleteAllButton.title = browser.i18n.getMessage("optionsDeleteRulesTooltip");
	showAllProfilesLabel.textContent = browser.i18n.getMessage("optionsAutoSettingsShowAllProfiles");
	showAutoSaveProfileLabel.textContent = browser.i18n.getMessage("optionsAutoSettingsShowAutoSaveProfile");
	ruleUrlInput.placeholder = ruleEditUrlInput.placeholder = browser.i18n.getMessage("optionsAutoSettingsUrlPlaceholder");
	synchronizeLabel.textContent = browser.i18n.getMessage("optionSynchronize");
	resetAllButton.textContent = browser.i18n.getMessage("optionsResetAllButton");
	resetCurrentButton.textContent = browser.i18n.getMessage("optionsResetCurrentButton");
	resetCancelButton.textContent = promptCancelButton.textContent = cancelButton.textContent = browser.i18n.getMessage("optionsCancelButton");
	confirmButton.textContent = promptConfirmButton.textContent = browser.i18n.getMessage("optionsOKButton");
	document.getElementById("resetConfirmLabel").textContent = browser.i18n.getMessage("optionsResetConfirm");
	if (location.href.endsWith("#")) {
		document.querySelector(".new-window-link").remove();
		document.documentElement.classList.add("maximized");
	}
	const tabsData = await browser.runtime.sendMessage({ method: "tabsData.get" });
	getHelpContents();
	refresh(tabsData.profileName);

	async function refresh(profileName) {
		const [profiles, rules] = await Promise.all([browser.runtime.sendMessage({ method: "config.getProfiles" }), browser.runtime.sendMessage({ method: "config.getRules" })]);
		const selectedProfileName = profileName || profileNamesInput.value || DEFAULT_PROFILE_NAME;
		Array.from(profileNamesInput.childNodes).forEach(node => node.remove());
		profileNamesInput.options.length = 0;
		ruleProfileInput.options.length = 0;
		ruleAutoSaveProfileInput.options.length = 0;
		ruleEditProfileInput.options.length = 0;
		ruleEditAutoSaveProfileInput.options.length = 0;
		let optionElement = document.createElement("option");
		optionElement.value = DEFAULT_PROFILE_NAME;
		optionElement.textContent = browser.i18n.getMessage("profileDefaultSettings");
		[CURRENT_PROFILE_NAME].concat(...Object.keys(profiles)).forEach(profileName => {
			const optionElement = document.createElement("option");
			optionElement.value = optionElement.textContent = profileName;
			if (profileName == DEFAULT_PROFILE_NAME) {
				optionElement.textContent = browser.i18n.getMessage("profileDefaultSettings");
			}
			if (profileName != CURRENT_PROFILE_NAME) {
				profileNamesInput.appendChild(optionElement);
			}
			ruleProfileInput.appendChild(optionElement.cloneNode(true));
			ruleAutoSaveProfileInput.appendChild(optionElement.cloneNode(true));
			ruleEditProfileInput.appendChild(optionElement.cloneNode(true));
			ruleEditAutoSaveProfileInput.appendChild(optionElement.cloneNode(true));
		});
		profileNamesInput.disabled = profileNamesInput.options.length == 1;
		optionElement = document.createElement("option");
		optionElement.value = DISABLED_PROFILE_NAME;
		optionElement.textContent = browser.i18n.getMessage("profileDisabled");
		ruleAutoSaveProfileInput.appendChild(optionElement);
		ruleEditAutoSaveProfileInput.appendChild(optionElement.cloneNode(true));
		const rulesDataElement = rulesElement.querySelector(".rules-data");
		Array.from(rulesDataElement.childNodes).forEach(node => (!node.className || !node.className.includes("rule-edit")) && node.remove());
		const editURLElement = rulesElement.querySelector(".rule-edit");
		createURLElement.hidden = false;
		editURLElement.hidden = true;
		ruleProfileInput.value = ruleAutoSaveProfileInput.value = selectedProfileName;
		let rulesDisplayed;
		rules.forEach(rule => {
			if (showAllProfilesInput.checked || selectedProfileName == rule.profile || selectedProfileName == rule.autoSaveProfile) {
				rulesDisplayed = true;
				const ruleElement = rulesElement.querySelector(".rule-view").cloneNode(true);
				const ruleUrlElement = ruleElement.querySelector(".rule-url");
				const ruleProfileElement = ruleElement.querySelector(".rule-profile");
				const ruleAutoSaveProfileElement = ruleElement.querySelector(".rule-autosave-profile");
				ruleUrlElement.textContent = ruleUrlElement.title = rule.url;
				ruleProfileElement.textContent = ruleProfileElement.title = getProfileText(rule.profile);
				ruleAutoSaveProfileElement.textContent = ruleAutoSaveProfileElement.title = getProfileText(rule.autoSaveProfile);
				ruleElement.hidden = false;
				ruleElement.className = "tr data";
				rulesDataElement.appendChild(ruleElement);
				const ruleDeleteButton = ruleElement.querySelector(".rule-delete-button");
				const ruleUpdateButton = ruleElement.querySelector(".rule-update-button");
				ruleDeleteButton.title = browser.i18n.getMessage("optionsDeleteRuleTooltip");
				ruleDeleteButton.addEventListener("click", async () => {
					if (await confirm(browser.i18n.getMessage("optionsDeleteRuleConfirm"), "flex-end")) {
						await browser.runtime.sendMessage({ method: "config.deleteRule", url: rule.url });
						await refresh();
						await refreshExternalComponents();
					}
				}, false);
				ruleUpdateButton.title = browser.i18n.getMessage("optionsUpdateRuleTooltip");
				ruleUpdateButton.addEventListener("click", async () => {
					if (editURLElement.hidden) {
						createURLElement.hidden = true;
						editURLElement.hidden = false;
						rulesDataElement.replaceChild(editURLElement, ruleElement);
						ruleEditUrlInput.value = rule.url;
						ruleEditProfileInput.value = rule.profile;
						ruleEditAutoSaveProfileInput.value = rule.autoSaveProfile;
						ruleEditUrlInput.focus();
						editURLElement.onsubmit = async event => {
							event.preventDefault();
							rulesElement.appendChild(editURLElement);
							await browser.runtime.sendMessage({ method: "config.updateRule", url: rule.url, newUrl: ruleEditUrlInput.value, profileName: ruleEditProfileInput.value, autoSaveProfileName: ruleEditAutoSaveProfileInput.value });
							await refresh();
							await refreshExternalComponents();
							ruleUrlInput.focus();
						};
					}
				}, false);
			}
		});
		rulesDeleteAllButton.disabled = !rulesDisplayed;
		rulesElement.appendChild(createURLElement);
		profileNamesInput.value = selectedProfileName;
		renameProfileButton.disabled = deleteProfileButton.disabled = profileNamesInput.value == DEFAULT_PROFILE_NAME;
		const profileOptions = profiles[selectedProfileName];
		removeHiddenElementsInput.checked = profileOptions.removeHiddenElements || profileOptions.saveRawPage;
		removeHiddenElementsInput.disabled = profileOptions.saveRawPage;
		removeUnusedStylesInput.checked = profileOptions.removeUnusedStyles;
		removeUnusedFontsInput.checked = profileOptions.removeUnusedFonts;
		removeFramesInput.checked = profileOptions.removeFrames || profileOptions.saveRawPage;
		removeFramesInput.disabled = profileOptions.saveRawPage;
		removeImportsInput.checked = profileOptions.removeImports;
		removeScriptsInput.checked = profileOptions.removeScripts;
		saveRawPageInput.checked = profileOptions.saveRawPage;
		saveToClipboardInput.checked = profileOptions.saveToClipboard && !profileOptions.saveToGDrive;
		saveToClipboardInput.disabled = profileOptions.saveToGDrive;
		addProofInput.checked = profileOptions.addProof;
		saveToGDriveInput.checked = profileOptions.saveToGDrive && !profileOptions.saveToClipboard;
		saveToGDriveInput.disabled = profileOptions.saveToClipboard;
		compressHTMLInput.checked = profileOptions.compressHTML;
		compressCSSInput.checked = profileOptions.compressCSS;
		loadDeferredImagesInput.checked = profileOptions.loadDeferredImages && !profileOptions.saveRawPage;
		loadDeferredImagesInput.disabled = profileOptions.saveRawPage;
		loadDeferredImagesMaxIdleTimeInput.value = profileOptions.loadDeferredImagesMaxIdleTime;
		loadDeferredImagesMaxIdleTimeInput.disabled = !profileOptions.loadDeferredImages || profileOptions.saveRawPage;
		contextMenuEnabledInput.checked = profileOptions.contextMenuEnabled;
		filenameTemplateInput.value = profileOptions.filenameTemplate;
		filenameTemplateInput.disabled = profileOptions.saveToClipboard;
		shadowEnabledInput.checked = profileOptions.shadowEnabled;
		maxResourceSizeEnabledInput.checked = profileOptions.maxResourceSizeEnabled;
		maxResourceSizeInput.value = profileOptions.maxResourceSize;
		maxResourceSizeInput.disabled = !profileOptions.maxResourceSizeEnabled;
		confirmFilenameInput.checked = profileOptions.confirmFilename;
		confirmFilenameInput.disabled = profileOptions.saveToClipboard;
		filenameConflictActionInput.value = profileOptions.filenameConflictAction;
		filenameConflictActionInput.disabled = profileOptions.saveToClipboard || profileOptions.saveToGDrive;
		removeAudioSrcInput.checked = profileOptions.removeAudioSrc;
		removeVideoSrcInput.checked = profileOptions.removeVideoSrc;
		displayInfobarInput.checked = profileOptions.displayInfobar;
		displayStatsInput.checked = profileOptions.displayStats;
		backgroundSaveInput.checked = profileOptions.backgroundSave;
		backgroundSaveInput.disabled = profileOptions.saveToGDrive;
		autoSaveDelayInput.value = profileOptions.autoSaveDelay;
		autoSaveDelayInput.disabled = !profileOptions.autoSaveLoadOrUnload && !profileOptions.autoSaveLoad;
		autoSaveLoadInput.checked = !profileOptions.autoSaveLoadOrUnload && profileOptions.autoSaveLoad;
		autoSaveLoadOrUnloadInput.checked = profileOptions.autoSaveLoadOrUnload;
		autoSaveUnloadInput.checked = !profileOptions.autoSaveLoadOrUnload && profileOptions.autoSaveUnload;
		autoSaveLoadInput.disabled = profileOptions.autoSaveLoadOrUnload;
		autoSaveUnloadInput.disabled = profileOptions.autoSaveLoadOrUnload;
		autoSaveRepeatInput.checked = profileOptions.autoSaveRepeat;
		autoSaveRepeatInput.disabled = !profileOptions.autoSaveLoadOrUnload && !profileOptions.autoSaveLoad;
		autoSaveRepeatDelayInput.value = profileOptions.autoSaveRepeatDelay;
		autoSaveRepeatDelayInput.disabled = !profileOptions.autoSaveRepeat;
		removeAlternativeFontsInput.checked = profileOptions.removeAlternativeFonts;
		removeAlternativeImagesInput.checked = profileOptions.removeAlternativeImages;
		groupDuplicateImagesInput.checked = profileOptions.groupDuplicateImages;
		removeAlternativeMediasInput.checked = profileOptions.removeAlternativeMedias;
		saveCreatedBookmarksInput.checked = profileOptions.saveCreatedBookmarks;
		replaceBookmarkURLInput.checked = profileOptions.saveCreatedBookmarks && profileOptions.backgroundSave && profileOptions.replaceBookmarkURL;
		replaceBookmarkURLInput.disabled = !profileOptions.saveCreatedBookmarks || !profileOptions.backgroundSave || profileOptions.saveToClipboard || profileOptions.saveToGDrive;
		infobarTemplateInput.value = profileOptions.infobarTemplate;
		includeInfobarInput.checked = profileOptions.includeInfobar;
		confirmInfobarInput.checked = profileOptions.confirmInfobarContent;
		autoCloseInput.checked = profileOptions.autoClose;
		openEditorInput.checked = profileOptions.openEditor;
		autoOpenEditorInput.checked = profileOptions.autoOpenEditor;
		removeFramesInput.disabled = saveRawPageInput.checked;
		removeFramesInput.checked = removeFramesInput.checked || saveRawPageInput.checked;
		loadDeferredImagesInput.disabled = saveRawPageInput.checked;
		if (saveRawPageInput.checked) {
			loadDeferredImagesInput.checked = false;
		}
	}

	function getProfileText(profileName) {
		return profileName == DEFAULT_PROFILE_NAME ? browser.i18n.getMessage("profileDefaultSettings") : profileName == DISABLED_PROFILE_NAME ? browser.i18n.getMessage("profileDisabled") : profileName;
	}

	async function update() {
		await pendingSave;
		pendingSave = browser.runtime.sendMessage({
			method: "config.updateProfile",
			profileName: profileNamesInput.value,
			profile: {
				removeHiddenElements: removeHiddenElementsInput.checked,
				removeUnusedStyles: removeUnusedStylesInput.checked,
				removeUnusedFonts: removeUnusedFontsInput.checked,
				removeFrames: removeFramesInput.checked,
				removeImports: removeImportsInput.checked,
				removeScripts: removeScriptsInput.checked,
				saveRawPage: saveRawPageInput.checked,
				saveToClipboard: saveToClipboardInput.checked,
				addProof: addProofInput.checked,
				saveToGDrive: saveToGDriveInput.checked,
				compressHTML: compressHTMLInput.checked,
				compressCSS: compressCSSInput.checked,
				loadDeferredImages: loadDeferredImagesInput.checked,
				loadDeferredImagesMaxIdleTime: Math.max(loadDeferredImagesMaxIdleTimeInput.value, 0),
				contextMenuEnabled: contextMenuEnabledInput.checked,
				filenameTemplate: filenameTemplateInput.value,
				shadowEnabled: shadowEnabledInput.checked,
				maxResourceSizeEnabled: maxResourceSizeEnabledInput.checked,
				maxResourceSize: Math.max(maxResourceSizeInput.value, 0),
				confirmFilename: confirmFilenameInput.checked,
				filenameConflictAction: filenameConflictActionInput.value,
				removeAudioSrc: removeAudioSrcInput.checked,
				removeVideoSrc: removeVideoSrcInput.checked,
				displayInfobar: displayInfobarInput.checked,
				displayStats: displayStatsInput.checked,
				backgroundSave: backgroundSaveInput.checked,
				autoSaveDelay: Math.max(autoSaveDelayInput.value, 0),
				autoSaveLoad: autoSaveLoadInput.checked,
				autoSaveUnload: autoSaveUnloadInput.checked,
				autoSaveLoadOrUnload: autoSaveLoadOrUnloadInput.checked,
				autoSaveRepeat: autoSaveRepeatInput.checked,
				autoSaveRepeatDelay: Math.max(autoSaveRepeatDelayInput.value, 1),
				removeAlternativeFonts: removeAlternativeFontsInput.checked,
				removeAlternativeImages: removeAlternativeImagesInput.checked,
				removeAlternativeMedias: removeAlternativeMediasInput.checked,
				saveCreatedBookmarks: saveCreatedBookmarksInput.checked,
				replaceBookmarkURL: replaceBookmarkURLInput.checked,
				groupDuplicateImages: groupDuplicateImagesInput.checked,
				infobarTemplate: infobarTemplateInput.value,
				includeInfobar: includeInfobarInput.checked,
				confirmInfobarContent: confirmInfobarInput.checked,
				autoClose: autoCloseInput.checked,
				openEditor: openEditorInput.checked,
				autoOpenEditor: autoOpenEditorInput.checked
			}
		});
		await pendingSave;
	}

	async function refreshExternalComponents() {
		try {
			await browser.runtime.sendMessage({ method: "ui.refreshMenu" });
			if (sidePanelDisplay) {
				await browser.runtime.sendMessage({ method: "options.refresh", profileName: profileNamesInput.value });
			} else {
				await browser.runtime.sendMessage({ method: "options.refreshPanel", profileName: profileNamesInput.value });
			}
		} catch (error) {
			// ignored
		}
	}

	async function saveCreatedBookmarks() {
		if (saveCreatedBookmarksInput.checked) {
			saveCreatedBookmarksInput.checked = false;
			try {
				const permissionGranted = await browser.permissions.request({ permissions: ["bookmarks"] });
				if (permissionGranted) {
					saveCreatedBookmarksInput.checked = true;
					await update();
					await refresh();
					await browser.runtime.sendMessage({ method: "bookmarks.saveCreatedBookmarks" });
				} else {
					await disableOption();
				}
			} catch (error) {
				await disableOption();
			}
		} else {
			await disableOption();
		}

		async function disableOption() {
			await update();
			await refresh();
			await browser.runtime.sendMessage({ method: "bookmarks.disable" });
		}
	}

	async function confirm(message, position = "center") {
		document.getElementById("confirmLabel").textContent = message;
		document.getElementById("formConfirmContainer").style.setProperty("display", "flex");
		document.querySelector("#formConfirmContainer .popup-content").style.setProperty("align-self", position);
		confirmButton.focus();
		document.body.style.setProperty("overflow-y", "hidden");
		return new Promise(resolve => {
			confirmButton.onclick = event => hideAndResolve(event, true);
			cancelButton.onclick = event => hideAndResolve(event);
			window.onkeyup = event => {
				if (event.key == "Escape") {
					hideAndResolve(event);
				}
			};

			function hideAndResolve(event, value) {
				event.preventDefault();
				document.getElementById("formConfirmContainer").style.setProperty("display", "none");
				document.body.style.setProperty("overflow-y", "");
				resolve(value);
			}
		});
	}

	async function reset() {
		document.getElementById("formResetContainer").style.setProperty("display", "flex");
		resetCancelButton.focus();
		document.body.style.setProperty("overflow-y", "hidden");
		return new Promise(resolve => {
			resetAllButton.onclick = event => hideAndResolve(event, "all");
			resetCurrentButton.onclick = event => hideAndResolve(event, "current");
			resetCancelButton.onclick = event => hideAndResolve(event);
			window.onkeyup = event => {
				if (event.key == "Escape") {
					hideAndResolve(event);
				}
			};

			function hideAndResolve(event, value) {
				event.preventDefault();
				document.getElementById("formResetContainer").style.setProperty("display", "none");
				document.body.style.setProperty("overflow-y", "");
				resolve(value);
			}
		});
	}

	async function prompt(message, position = "center", defaultValue = "") {
		document.getElementById("promptLabel").textContent = message;
		document.getElementById("formPromptContainer").style.setProperty("display", "flex");
		document.querySelector("#formPromptContainer .popup-content").style.setProperty("align-self", position);
		promptInput.value = defaultValue;
		promptInput.focus();
		document.body.style.setProperty("overflow-y", "hidden");
		return new Promise(resolve => {
			promptConfirmButton.onclick = event => hideAndResolve(event, promptInput.value);
			promptCancelButton.onclick = event => hideAndResolve(event);
			window.onkeyup = event => {
				if (event.key == "Escape") {
					hideAndResolve(event);
				}
			};

			function hideAndResolve(event, value) {
				event.preventDefault();
				document.getElementById("formPromptContainer").style.setProperty("display", "none");
				document.body.style.setProperty("overflow-y", "");
				resolve(value);
			}
		});
	}

	async function getHelpContents() {
		const helpPage = await fetch(browser.runtime.getURL(HELP_PAGE_PATH));
		const content = new TextDecoder().decode(await helpPage.arrayBuffer());
		const doc = (new DOMParser()).parseFromString(content, "text/html");
		const items = doc.querySelectorAll("[data-options-label]");
		items.forEach(itemElement => {
			const optionLabel = document.getElementById(itemElement.dataset.optionsLabel);
			const helpIconContainer = document.createElement("span");
			const helpIcon = document.createElement("img");
			helpIcon.src = HELP_ICON_URL;
			helpIconContainer.className = "help-icon";
			helpIconContainer.onclick = () => {
				helpContent.hidden = !helpContent.hidden;
				return false;
			};
			helpIcon.tabIndex = 0;
			helpIconContainer.onkeyup = event => {
				if (event.code == "Enter") {
					helpContent.hidden = !helpContent.hidden;
					return false;
				}
			};
			helpIconContainer.appendChild(helpIcon);
			optionLabel.appendChild(helpIconContainer);
			const helpContent = document.createElement("div");
			helpContent.hidden = true;
			helpContent.className = "help-content";
			itemElement.childNodes.forEach(node => {
				if (node instanceof HTMLElement && node.className != "option") {
					helpContent.appendChild(document.importNode(node, true));
				}
			});
			helpContent.querySelectorAll("a[href]").forEach(linkElement => {
				const hrefValue = linkElement.getAttribute("href");
				if (hrefValue.startsWith("#")) {
					linkElement.href = browser.runtime.getURL(HELP_PAGE_PATH + linkElement.getAttribute("href"));
					linkElement.target = "_blank";
				}
			});
			optionLabel.parentElement.insertAdjacentElement("afterEnd", helpContent);
		});
	}

	function getLocalStorageItem(key) {
		try {
			return localStorage.getItem(key);
		} catch (error) {
			// ignored
		}
	}

	function setLocalStorageItem(key, value) {
		try {
			return localStorage.setItem(key, value);
		} catch (error) {
			// ignored
		}
	}

	function removeLocalStorageItem(key) {
		try {
			return localStorage.removeItem(key);
		} catch (error) {
			// ignored
		}
	}

})();