Restore previous session before upgrade
I'm lost, I tried countless of different "solutions" on the web to restore the previous session before I updated my old Firefox. When I update from version 54 to the newest one, all my open tabs are gone, or FF opens tabs from YEARS ago. I have a full backup of the original V54 instalation including the Mozilla folders in LocalLow, Local and Roaming. So swapping files is no problem.
I badly need all the open tabs again for productivity reasons alone. I hope someone knows how to restore the previous session before the upgrade.
Chosen solution
Hi
With that old Firefox 54 version you probably have a uncompressed sessionstore.js file for your session data. You will have to remove the existing sessionstore.jsonlz4 file and probably also rename/remove the sessionstore-backups folder to make Firefox fallback to sessionstore.js.
Note that best is to update manually from 54 to the current release via "Help -> About Firefox" to ensure that migration code to update files to a new scheme is run as you can lose more data like the logins.
Read this answer in context 👍 1All Replies (2)
Chosen Solution
Hi
With that old Firefox 54 version you probably have a uncompressed sessionstore.js file for your session data. You will have to remove the existing sessionstore.jsonlz4 file and probably also rename/remove the sessionstore-backups folder to make Firefox fallback to sessionstore.js.
Note that best is to update manually from 54 to the current release via "Help -> About Firefox" to ensure that migration code to update files to a new scheme is run as you can lose more data like the logins.
Hot damn, that did it! Didn't know that the filetype changed. No wonder that it didn't work before.