Sometimes, my Firefox 4 beta 10 crashes and after restart it does not recover last opened tabs.
In my Firefox 3 it functioned always.
Someone knows how to fix it?
General tab in Preferences, you might want to set
When Firefox Starts to Show my Windows and Tabs from Last Time. It's very possible that Firefox 4 (which, as bruno077 reminded us, still is in beta) isn't registering the fact that it crashed correctly.
Also, make sure that
browser.sessionstore.resume_from_crash is set to
true and that
browser.sessionstore.max_resumed_crashes is greater than or equal to one in