Desktop: Fixes #9607: Copied and pasted text from Firefox to RTE does…

… not include images

packages/app-desktop/gui/NoteEditor/utils/resourceHandling.ts

@@ -12,6 +12,7 @@ import { fileUriToPath } from '@joplin/utils/url';
 import { MarkupLanguage } from '@joplin/renderer';
 import { HtmlToMarkdownHandler, MarkupToHtmlHandler } from './types';
 import markupRenderOptions from './markupRenderOptions';
+import { fileExtension, filename, safeFileExtension, safeFilename } from '@joplin/utils/path';
 const joplinRendererUtils = require('@joplin/renderer').utils;
 const { clipboard } = require('electron');
 const mimeUtils = require('@joplin/lib/mime-utils.js').mime;
@@ -154,7 +155,11 @@ export async function processPastedHtml(html: string, htmlToMd: HtmlToMarkdownHa
 
 	const downloadImage = async (imageSrc: string) => {
 		try {
-			const filePath = `${Setting.value('tempDir')}/${md5(Date.now() + Math.random())}`;
+			const fileExt = safeFileExtension(fileExtension(imageSrc));
+			const name = safeFilename(filename(imageSrc));
+			const pieces = [name ? name : md5(Date.now() + Math.random())];
+			if (fileExt) pieces.push(fileExt);
+			const filePath = `${Setting.value('tempDir')}/${pieces.join('.')}`;
 			await shim.fetchBlob(imageSrc, { path: filePath });
 			const createdResource = await shim.createResourceFromPath(filePath);
 			await shim.fsDriver().remove(filePath);