I have uninstalled Firefox Quantum browser previously installed via "Ubuntu Software" on 18.04.2. Does that mean all my profile data is lost altogether with the bookmarks?

I was expecting to find the data in my default profile directory still on the disk so I can copy it to the "vanilla" Firefox installation via apt. Looking for the places.sqlite does show it in the newly installed Firefox profile but not the old Firefox Quantum one.

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3 Answers

Yes, unlike the Firefox deb package, it erases your profile.

This is despite Mozilla flatly stating that removing Firefox does not remove profiles, with no caveat concerning snap.

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I do not know the accurate answer because I do not use snap, which leaves me with very awful impression.

However, if the folder ~/.mozilla/firefox exist, then it is very easy to backup your firefox profile, see for specific method.

Unfortunately yes. After the upgrade of Ubuntu 20.04 to a new 22.04, I realized that the default web browser was no more pointing to the firefox. The reason was the snap version of the application (instead of the apt based one). I removed the snap version (in order to install the apt based one) and as a side effect I lost all my bookmarks, saved passwords, everything :-(

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