Bookmarks and toolbar buttons not working after upgrading
Firefox 3 stores your bookmarks and browsing history in the "Places database". If the places database is damaged or if Firefox is unable to access the file for other reasons, many functions will not work. Symptoms include bookmarks disappearing or not saving, browsing history not saving and toolbar buttons such as Back and Forward not working. If you are having these problems, try the solutions listed below.
How to start Firefox if you see an error message, "Firefox is already running, but is not responding" or, on macOS, "A copy of Firefox is already open".
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