Upgrading to the new version of Firefox (84+) on Apple Silicon

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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:

  1. Go to the Firefox menu at the top of the screen.
  2. Select Quit Firefox.
    quit firefox
  3. 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.

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