Initial commit

README.md

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+# Open With FreeTube
+
+This extension adds a **right-click menu item** to YouTube (or Invidious) links which will open them with FreeTube

manifest.json

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+{
+
+  "manifest_version": 2,
+  "name": "Open with FreeTube",
+  "description": "Adds a context menu item to open YouTube links in FreeTube",
+  "author": "rail5",
+  "version": "1.0",
+  "browser_specific_settings": {
+    "gecko": {
+      "strict_min_version": "60.0a1",
+      "id": "open-with-freetube@rail5.org"
+    }
+  },
+  "icons": {
+    "48": "icon/48.png",
+    "128": "icon/128.png",
+    "256": "icon/256.png"
+  },
+
+  "background": {
+    "scripts": ["src/main.js"]
+  },
+  
+  "permissions": [
+    "menus",
+    "<all_urls>"
+  ]
+
+}

src/main.js

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+'use strict';
+
+const itemId = "open-with-freetube";
+
+browser.menus.onClicked.addListener((info, tab) => {
+	if (info.menuItemId === itemId) {
+		// Append 'freetube:' to the beginning of the link & trim everything before "/watch?v="
+		let freetubelink = "freetube:" + info.linkUrl.slice(info.linkUrl.indexOf("/watch?v="));
+		// Open the new link
+		browser.tabs.update(tab.id, {
+			url: freetubelink
+		});
+	}
+});
+
+function createMenuItem() {
+	browser.menus.create({
+		id: itemId,
+		title: "Open with FreeTube",
+		contexts: ["link"]
+	});
+	browser.menus.refresh();
+}
+
+function destroyMenuItem() {
+	browser.menus.remove(itemId);
+	browser.menus.refresh();
+}
+
+browser.menus.onShown.addListener(info => {
+	if (!info.linkUrl) {
+		// Destroy if not a link
+		destroyMenuItem();
+		return;
+	}
+	
+	if (!(info.linkUrl.includes("/watch?v="))) {
+		// Destroy if not a YouTube watch link
+		destroyMenuItem();
+		return;
+	}
+	
+	if (info.linkUrl.includes("freetube:/")) {
+		// Destroy if already a FreeTube link
+		destroyMenuItem();
+		return;
+	}
+	// Add the menu item if we've passed the checks so far without returning
+	createMenuItem();
+	
+	let linkElement = document.createElement("a");
+	linkElement.href = info.linkUrl;
+});