Initial commit

flake.nix

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+{
+  description = "yt-share-cleaner - remove tracking from YouTube share URLs";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs }: let
+  system = "x86_64-linux";
+  pkgs = nixpkgs.legacyPackages.${system};
+  in {
+    devShells.${system}.default = pkgs.mkShell {
+      nativeBuildInputs = with pkgs; [
+        web-ext
+      ];
+    };
+  };
+}

manifest.json

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+{
+  "manifest_version": 3,
+  "name": "yt-share-cleaner",
+  "version": "0.0.1",
+
+  "description": "Cleans tracking from share URLs on YouTube",
+
+  "icons": {
+    "16": "icons/yt-share-cleaner-16.png",
+    "32": "icons/yt-share-cleaner-32.png",
+    "64": "icons/yt-share-cleaner-64.png",
+    "128": "icons/yt-share-cleaner-128.png",
+    "256": "icons/yt-share-cleaner-256.png"
+  },
+
+  "permissions": [
+    "activeTab",
+    "clipboardRead",
+    "clipboardWrite"
+  ],
+
+  "content_scripts": [
+    {
+      "js": ["yt-share-cleaner.js"],
+      "matches": ["*://*.youtube.com/*"]
+    }
+  ]
+}

yt-share-cleaner.js

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+(function() {
+    // 'use strict';
+    function isShareLink(url) {
+        // test if input is a share link, return True or False
+        const regex = /https:\/\/youtu\.be\/[A-Za-z0-9\_-]+\?si=.+/i;
+        const isShareLink = regex.test(url);
+        return(isShareLink)
+    }
+
+    function cleanUrl(url){
+        // clean tracker from URL if it is a share link
+        if (isShareLink(url)) {
+            // replace tracker portion with empty string
+            const cleanedUrl = url.replace(/\?si=[^&]+&?/, "");
+            return(cleanedUrl)
+        }
+        // return original url if it is not a share link
+        console.log("Not a share link, clipboard contents unmodified.")
+        return(url)
+    }
+
+    function sleep(ms) {
+        return new Promise(resolve => setTimeout(resolve, ms));
+    }
+
+    async function onMouseUp() {
+        // wait half a second after clicking before reading clipboard
+        await sleep(500);
+        
+        let clipText = await navigator.clipboard.readText();
+        let newText = cleanUrl(clipText);
+
+        if (clipText !== newText) {
+            const newClip = await navigator.clipboard.writeText(newText);
+            console.log("Modified clipboard with cleaned share link: %o", newText);
+            clipText = undefined;
+            newText = undefined;
+        }
+        clipText = undefined;
+        newText = undefined;
+    }
+
+    document.addEventListener('mouseup', onMouseUp, false);
+})();