Firefox freeze/is not responding ·
another meaningless subtitle

Firefox freeze/is not responding

· by fabio · Read in about 1 min · (113 Words)

After some years of using Firefox (currently version 38.0.5) with Session Restore enabled (the browser saves all the tabs from the previous session and reload them at the next start-up) it started to act weird and freeze for around 10 seconds 3 or 4 times a day.
This very annoying behavior is caused by the presence of multiple useless Session Restore files.
To delete those files open a new tab and type “about:support” in the address bar, then in the “Application Basics” area click on the “Open Directory” button placed next to “Profile Directory”.
Delete every file named “sessionstoresomething.js” and everything inside “sessionstore-backups” directory.
Close and reopen Firefox, this should solve the problem.