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Hello, after I installed Firefox ESR, all my bookmarks disappeared. Is there any chance to get them back, as well as my browser extensions? I would like to go back to the state before the installation of ESR.

Hello, after I installed Firefox ESR, all my bookmarks disappeared. Is there any chance to get them back, as well as my browser extensions? I would like to go back to the state before the installation of ESR.

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I guess another profile has been added during the installation of ESR. Enter about:profiles in the address bar and choose a different profile.

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What version of Firefox were you running before? If it was a higher numbered version, and Sync did not copy over the relevant data, you may need to copy/paste some files manually. If there was a large difference between the previous version number and the ESR, some of the file may no longer be compatible with the ESR.

See: Recovering important data from an old profile