SDB:Clean Firefox Database
With time SQLite database used by Firefox from version 3.0 get with time fragmented and access is slower, which slows down browsing, opening and closing Firefox.
To clean it up and make Firefox snappy as on day of installation, open your favorite console, and run as normal user:
cd ~/.mozilla find . -name '*.sqlite' -exec sqlite3 '{}' 'VACUUM;' \;
Tip by Sankar P, Novell.