CatBlock for Firefox

Block ads, trackers, and pop-ups in Firefox, free for 7 days, no card to start.

Download for Firefox (.zip)
  1. Download the .zip. Click Download for Firefox above and keep the file.
  2. Load it in Firefox. Open about:debugging#/runtime/this-firefox, click Load Temporary Add-on… and pick the downloaded catblock-firefox-*.zip.
  3. Pin & browse. Pin CatBlock from the toolbar. Blocking is on right away.

Temporary add-ons are removed when Firefox restarts. CatBlock is coming to Firefox Add-ons — installs from the listing will be permanent and update automatically.