This repository is the official community-maintained issue tracker for uBO.

For support, questions, or help, visit /r/uBlockOrigin.

Report any issues with filter lists or broken website functionality in the uAssets issue tracker.

New filter list requests are not permitted and will be declined and closed.

Report issues specific to the Chromium Manifest Version 3 (MV3) variant in the uBOL issue tracker.

Report issues specific to the legacy variant in the uBO Legacy issue tracker.

Speculated performance issues will be marked as invalid and closed if they do not come with actual profiling data from the Firefox Profiler/Chromium Profiler and a fully substantiated analysis supporting the claim.

Do not open any issues about WebRTC leaking local IP addresses. Supported modern browsers do not cause undue local IP address leaks through WebRTC, and uBO is not a VPN/proxy tool. If you are experiencing such an issue, report it to the browser or VPN/proxy tools software provider or, if needed, both.

You can use the development build to help report new issues and regressions before the stable release is published.

Once you install a development build, it will automatically update when a new version is published.

• Chromium: Install from the Chrome Web Store.

• Firefox: Click the most recent uBlock0_[version].firefox.signed.xpi file from the uBO Releases page.

• Thunderbird: Download the most recent uBlock0_[version].thunderbird.xpi file from the uBO Releases page, then drag-n-drop it into Thunderbird's Add-ons Manager pane (Thunderbird 65+ required).