Firefox tricks

Search from bookmarks only:
1. Press F6 i.e. goto search/url bar
2. Press *[_]search_text i.e. star space search_text
Search from open tabs only:
1. Press F6 i.e. goto search/url bar
2. Press % search_text i.e. star space search_text
Restart the firefox without losing current tabs or context:
1. Press Shift+f2, a shell at bottom of screen will show up.
2. Type restart
Find your profile folder location from firefox itself.
1. Press F6 i.e. goto search/url bar
2. Type about:support, will show all the details.

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