You want to know where Firefox stores your bookmarks in Windows 7? Can’t seem to find the bookmarks.html file that you used to back up regularly?
Due to corrupt bookmarks, Mozilla introduced a sqllite filesystem for storing cookies, authentication, bookmarks and the like. That’s how they avoid corrupt bookmarks. Plus Mozilla makes backups of your bookmarks.
Firefox bookmarks location
Go to C:\Users\[username]\AppData\Roaming\Mozilla\Firefox\Profiles\[string].default\
In there open places.sqlite with a notepad editor to see your bookmarks. You need to backup the places.sqlite file! The old bookmarks.html no longer exists.
Go to bookmarkbackups inside the profile\…default folder to see your backed up bookmarks. I
How to delete my Firefox bookmarks?
Deleting your bookmarks can help you to speed up Firefox. However, in order to delete your bookmarks it is not sufficient to delete the places.sqlite file, you also need to delete the backup files or Firefox will automatically restore a backup! Sneaky, huh?
So, delete the entire folder C:\Users\[username]\AppData\Roaming\Mozilla\Firefox\Profiles\[string].default\bookmarkbackups as well