Hello everybody. I'm having trouble loading back-uped session after Firefox didn't load opened tabs. I have made a copy of whole folder called 'session-store backups' and have these files: previous.js recovery.bak recovery.js upgrade.js-20160604131506 upgrade.js-20160623154057 upgrade.js-20160823121617 Following instructions I found on this site I copied each file to profile folder and renamed to 'sessionstore.js' with no firefox running. This method worked only with 'upgrade.js-xxx' files however 'upgrade.js-xxx' files contain only half tabs I have in other files. How can I load other files then? Why Firefox is not loading them?