One feature that surfaced in recent nightly builds that’s included in this beta is the ability to reopen accidentally closed browser windows. Firefox has had the incredibly useful “Undo Close Tabs” feature for a while, so the ability to recall closed windows should also be handy. You can access closed windows under “Recently Closed Windows” in your “History” menu, or quickly re-open the latest closed window by hitting Ctrl+Shift+N(Windows)/Cmd+Shift+N(Mac).
It’s important to note that this is still a beta version so there may still be some bugs to squash yet, but I’m using it to write out this post and it seems quick and stable.
What do you think of the new Firefox beta?