Perch
Free for macOSDownload
Firefox 140 or later.

Perch for Firefox

Perch’s companion extension for Firefox works in Firefox, Firefox ESR, Developer Edition and Nightly.

Not in the store yetFirefox Add-ons
Firefox 140 or later
  1. Open Show Setup Guide… from Perch’s menu and choose Firefox.
  2. Install the companion in each Firefox profile you want connected.
  3. Check Perch’s menu for that profile. The extension stays installed when Firefox quits and reconnects by itself when Firefox opens again.

Firefox has no basic connection, so Perch reaches Firefox only through the companion. Private windows are never included. More in the manual.