Fix --http-header issue

cli/back-ends/playwright-chromium.js

@@ -74,7 +74,7 @@ async function setPageOptions(page, options) {
 			height: options.browserHeight
 		});
 	}	
-	if (options.httpHeaders && options.httpHeaders.length) {
+	if (options.httpHeaders) {
 		page.setExtraHTTPHeaders(options.httpHeaders);
 	}
 }

cli/back-ends/playwright-firefox.js

@@ -74,7 +74,7 @@ async function setPageOptions(page, options) {
 			height: options.browserHeight
 		});
 	}
-	if (options.httpHeaders && options.httpHeaders.length) {
+	if (options.httpHeaders) {
 		page.setExtraHTTPHeaders(options.httpHeaders);
 	}
 }

cli/back-ends/puppeteer-firefox.js

@@ -81,7 +81,7 @@ async function setPageOptions(page, options) {
 			// ignored
 		}
 	}
-	if (options.httpHeaders && options.httpHeaders.length) {
+	if (options.httpHeaders) {
 		try {
 			await page.setExtraHTTPHeaders(options.httpHeaders);
 		} catch (error) {

cli/back-ends/puppeteer.js

@@ -88,7 +88,7 @@ async function setPageOptions(page, options) {
 	if (options.browserBypassCSP === undefined || options.browserBypassCSP) {
 		await page.setBypassCSP(true);
 	}
-	if (options.httpHeaders && options.httpHeaders.length) {
+	if (options.httpHeaders) {
 		page.setExtraHTTPHeaders(options.httpHeaders);
 	}
 	if (options.browserStartMinimized) {