See this thread for the pencil icon on Mac, a reinstall might work: * [[/questions/1204656]] Icon in the dock looks like a pad and pencils...no fox! * delete the Firefox icon from the dock * create a new icon by dragging the Firefox application to the dock * reinstall Firefox ---- Your personal data like bookmarks is stored in the Firefox profile folder, so you won't lose personal data when you reinstall or update Firefox, but make sure NOT to remove personal data when you uninstall Firefox as that will remove all Firefox profile folders and you lose your personal data. *https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles