This is the official community-maintained issue tracker for uMatrix. Do not post issues regarding broken sites.

uMatrix is a browser firewall, you're expected to be able to unbreak any breakage caused by the ruleset.

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

Support issues and questions are handled at /r/uMatrix.

You can help with the development of uMatrix by using the development build, in order to report new issues or regression bugs before stable releases of uMatrix are published.

Development builds:

• Chromium-based browsers: https://chrome.google.com/webstore/detail/umatrix-dev-build/eckgcipdkhcfghnmincccnhpdmnbefki
• Firefox: click the most recent uMatrix.webext.signed.xpi file from https://github.com/gorhill/uMatrix/releases

If you install a development build once, it will be automatically updated with a more recent development build version when a new one is published.