uU (untrack URLs) is a browser extension that sanitizes tracked URLs and bypasses tracked redirects for the following services (if possible):

• Action Map (URLs)
• ActiveCampaign (URLs)
• Action Network (URLs)
• Adjust (redirects)
• Adobe (URLs)
• Airbnb (URLs)
• Alibaba (URLs)
• AliExpress (URLs)
• Amazon (URLs, redirects)
• AOL (URLs)
• Apple (URLs)
• app.link (URLs)
• AT Internet (URLs)
• BackerKit (URLs)
• BambooHR (URLs)
• Bandcamp (URLs)
• BBC (URLs)
• BestBuy (URLs)
• Bilibili (URLs)
• Bing (URLs)
• Blackbaud (URLs)
• Bloomberg (URLs)
• Blueshift (URLs)
• Branch (URLs)
• Brave (URLs)
• Bronto (URLs)
• CaseKing.de (URLs)
• Cell Press (URLs)
• Change.org (URLs)
• Cision (redirects)
• CJ (URLs)
• CNET (URLs)
• Commission Factory (redirects)
• comScore (redirects)
• Connexity (redirects)
• ConvertKit (URLs)
• CurseForge (redirects)
• Customer.io (redirects)
• Customer Experience Analytics (URLs)
• Dialog Insight (URLs)
• digidip (redirects)
• Disqus (URLs, redirects)
• Dotdigital (URLs)
• DoubleClick (redirects)
• Drip (URLs)
• DPM Media Group (URLs)
• DuckDuckGo (redirects)
• eBay (URLs)
• Ebsta (redirects)
• El Financiero (URLs)
• Epic Games (redirects)
• Epsilon (dotomi.com) (redirects)
• Etsy (URLs)
• Eventbrite (URLs)
• Evernote (redirects)
• Facebook (URLs, redirects)
• Fever (URLs)
• Flipkart (URLs)
• FlyingPress (URLs)
• GameSpot (URLs)
• Geniuslink (URLs)
• GitHub (URLs)
• Giphy (URLs)
• GMX (redirects)
• GoDataFeed (URLs)
• GOG (URLs)
• Goodreads (URLs)
• Google (URLs, redirects including AMP; NOTE: Google Docs HTML-exported pages are only supported/intercepted when open in the browser: Today I found out that google docs infects html exports with spyware, no scripts, but links in your document are replaced with invisible google tracking redirects. I was using their software because a friend wanted me to work with him on a google doc, he is a pretty big fan of their software, but we were both somehow absolutely shocked that they would go that far.)
• The Guardian (URLs)
• HackerNoon (URLs)
• Harvard Business Review (URLs)
• Hive (URLs)
• href.li (redirects)
• HubSpot (URLs)
• Humble Bundle (URLs)
• IACR (URLs)
• IBM (URLs)
• icptrack (redirects)
• IMDb (URLs and redirects)
• Impact (ex-Impact Radius) (URLs)
• Instagram (URLs and redirects)
• Instapage (redirects)
• itm_... (URLs)
• JavLibrary (redirects)
• jdoqocy (redirects)
• Kickstarter (URLs)
• Klarna (redirects)
• Klaviyo (URLs)
• Kraken (redirects)
• Lever (redirects)
• LinkedIn (URLs, redirects)
• Listrak (URLs)
• LivePerson (URLs)
• Magento (URLs)
• MailChimp (URLs)
• MailerLite (URLs)
• Mailpanion (redirects)
• Mailtrack.io (redirects)
• Mandrill (URLs)
• Marin (URLs)
• Matomo/Piwik (URLs)
• Medium (redirects)
• Messenger (redirects)
• Microsoft (URLs)
• Microsoft 365 (former Microsoft Office) (redirects)
• Mozilla (redirects)
• MSN (URLs)
• Narvar (URLs)
• Netflix (URLs)
• New Yorker (URLs)
• Nextdoor (URLs)
• NS (URLs)
• New York Post (URLs)
• New York Times (URLs)
• ojrq.net (redirects)
• Omeda (URLs)
• OnlyFans (redirects)
• Oracle (redirects)
• Outlook (redirects)
• Pinterest (redirects)
• Pocket (URL, redirects)
• Postmark (redirects)
• Rakuten Advertising (URLs and redirects)
• Reddit (redirects)
• Redfin (URLs)
• Reuters (redirects)
• Rokt (URLs)
• RuTracker (URLs)
• Salesforce (URLs)
• SC (URLs)
• Seek (URLs)
• ShareASale (URLs)
• Shutterstock (URLs)
• Simple Share (URLs)
• Skimlinks (redirects)
• Slack (redirects)
• Snapchat (URLs)
• Songkick (URLs)
• SoundCloud (redirects)
• SourceForge (URLs)
• Spotify (URLs)
• Springbot (URLs)
• Squarespace (URLs)
• stealthGram (redirects)
• Steam (redirects)
• STM (URLs)
• Takeads (redirects)
• Taobao (redirects)
• Target (redirects)
• TechCrunch (URLs)
• TikTok (URLs and redirects)
• Toyhouse (redirects)
• Tradedoubler (redirects)
• go.trafficrouter.io (redirects)
• Tumblr (redirects)
• Twitch (URLs)
• Urchin Tracking Module (URLs)
• ValueClick (redirects)
• Vero (URLs)
• VK (redirects)
• Walmart (URLs)
• Washington Post (URLs)
• Webtrekk (URLs)
• Webtrends Analytics (URLs)
• Wicked Reports (URLs)
• Wikipedia (URLs)
• Wired (URLs)
• Workable (redirects)
• Wall Street Journal (URLs)
• Wunderkind (URLs)
• X (ex-Twitter) (URLs, redirects)
• Yahoo (URLs)
• Yandex (URLs)
• YouTube (URLs, redirects)
• Zanox (URLs)
• Zillow (URLs)
• Zoopla (URLs)
• ... and some other common stuff for URLs

Candidates

• Parse.ly Campaign seems to be too board to be unsafely removed from all URLs.
• Facebook, Product Hunt ref seems to be too board to be unsafely removed from all URLs.
• Unknown campaign, campaignid, mp, sl, tpl, unlock tracking parameters.

Rejected

• Unknown source var is a too broad generic query parameter.

Scopes

Scope	Is supported?	Notes
Navigation and HTTP requests in general	Yes	This allows untracking URLs for every HTTP request the browser sends utilizing the webRequest API. This also why uU requires the permissions webRequest and webRequestBlocking to modify HTTP requests for all sites.
Bookmarks sanitizing	Yes	This allows untracking URLs for each bookmark whose tracked URL invaded your bookmark collections utilizing the bookmarks API. This also why uU requires global permissions bookmarks to access the bookmarks.
Sharing links	Yes, via the context menu	Currently uU does not untrack URLs on the page (in the DOM). The "Copy Untracked Link" from the context menu copies an untracked link similarly "Copy Link Without Site Tracking" that is implemented by Mozilla Firefox itself.
On-page links	No	To be discussed.
Warned page redirects	Dropped	In principle, this is greatly supported by uMatrix and the feature of uU is a subject for potential removal.
Randomized tracking parameters poisoning	No	To be discussed.

Why Firefox only

Currently uU and μuU are designed for use in Mozilla Firefox only just because Mozilla Firefox does not restrict manifest.json to the very limited v3 that is forced in Google Chrome. I didn't check how the extension works in browsers other than Mozilla Firefox.

uU and μuU are currently published at:

• uU - addons.mozilla.org
• μuU - addons.mozilla.org

Thanks

The uU and μuU untracking rules are built on top of:

• Tracking Token Stripper by Jon Parise, actually the idea of uU grown from;
• some rules from PrivacyTests.org by Arthur Edelstein (last updated 2022-04-16);
• some rules from Neat-URL (default-params-by-category.json) by Geoffrey De Belie (last updated 2022-05-01);
• all rules from clean-links by Sh1d0w (last updated 2023-11-10);
• all rules from untrack by Kyle Lanchman (last updated 2023-11-10);
• all rules from Mozilla Firefox by Mozilla Foundation and its contributors (last updated 2023-11-27);
• all rules from Intercept Redirect by Bjorn Stromberg (last updated 2024-06-12);
• no rules from Butter by Doctor Popular (last updated 2024-06-14);
• no rules from Feedly UTM Redirector by thakyuu (last updated 2024-06-14);
• no rules from Fuck UTM by Smitha Milli (last updated 2024-06-14) (NOTE: I also considered poisoning tracking parameters in mind);
• all rules from UTM Eraser by Nick (last updated 2024-06-14);
• all rules from Brave by the Brave authors (last updated 2024-06-15);
• most rules from avoison by dryack (last updated 2024-06-16);
• all clean-URLs rules from adblock-lists by the Brave authors (last updated 2024-06-18);
• all rules from tracking-query-params-registry by Max Chadwick (last updated 2024-06-22);
• all rules from the [https://docs.flyingpress.com/en/article/ignore-query-parameters-yfejfj/ FlyingPress ignore query parameters list] (last updated 2024-08-06);
• and some rules available online.

The icon is merely generated with Launcher icon generator by Roman Nurik.

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