If you’re on a Mac computer with Apple Silicon, you will need to fully exit and restart Firefox after upgrading to Firefox 84+ in order for Firefox to run on the new architecture, which has faster performance and better battery life.
After updating to Firefox 84+ from an older version:
- Go to the menu at the top of the screen.
- Select .
- When you re-open Firefox, you’ll be on the new architecture.
Tip: You can also confirm that you’re using the Apple Silicon version of Firefox by entering about:support in the address bar and seeing that Rosetta Translated is showing up as false.
