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I just got royally screwed over by Firefox v75
I no longer have any:
passwords addons bookmarks history previously opened tabs user configuration
Nothing. Everything was completely wiped out. And that's just what I know about. Who knows what else is gone.
Does anyone know how I can retrieve this lost information.
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If you lost personal data then it is possible that a new default-release profile folder has been created. See "Determine if Firefox has created a new profile":
You can open the about:profiles page via the location bar to check whether multiple profiles are present and what profile Firefox currently is using.
- Do NOT click any Remove button on this page.
Firefox 67 and later can use a dedicated profile for each of the Firefox update channels and will lock the profile, so it can only be used by Firefox in a specific installation folder. For Release versions this profile would be a xxxxxxxx.default-release profile, profiles used in older Firefox versions usually used a xxxxxxxx.default profile (a refresh adds a time stamp).