decode stylesheets found in data: URIs

lib/single-file/single-file-core.js

@@ -359,7 +359,7 @@ const SingleFileCore = (() => {
 				const match = DomUtil.matchImport(cssImport);
 				if (match) {
 					const resourceURL = DomUtil.normalizeURL(match.resourceURL);
-					if (resourceURL != baseURI && DomUtil.testValidPath(match.resourceURL)) {
+					if (resourceURL != baseURI) {
 						let importedStylesheetContent = await Download.getContent(new URL(match.resourceURL, baseURI).href);
 						importedStylesheetContent = DomUtil.wrapMediaQuery(importedStylesheetContent, match.media);
 						if (stylesheetContent.indexOf(cssImport) != -1) {
@@ -390,7 +390,7 @@ const SingleFileCore = (() => {
 
 		static async resolveLinkStylesheetURLs(resourceURL, baseURI, media) {
 			resourceURL = DomUtil.normalizeURL(resourceURL);
-			if (resourceURL && resourceURL != baseURI && DomUtil.testValidPath(resourceURL)) {
+			if (resourceURL && resourceURL != baseURI) {
 				let stylesheetContent = await Download.getContent(resourceURL);
 				stylesheetContent = await DomProcessorHelper.resolveImportURLs(stylesheetContent, resourceURL);
 				stylesheetContent = DomUtil.wrapMediaQuery(stylesheetContent, media);