Hello eros.belio! Please take a look at the profile and bookmark data. If those still in your local files there might be a way to restore them. Please confirm if you have the files. '''Storage Locations by Operating System''' '''Windows: '''Firefox profile data is stored in two separate locations : Main profile (bookmarks, passwords, settings): C:\Users\<username>\AppData\Roaming\Mozilla\Firefox\Profiles\<profile_folder>\ Cache and temporary files: C:\Users\<username>\AppData\Local\Mozilla\Firefox\Profiles\<profile_folder>\ '''macOS:''' Profile data is located at ~/Library/Application Support/Firefox/Profiles/<profile_folder>/ '''Linux:''' Profile data is stored at ~/.mozilla/firefox/<profile_folder>/ Once you've identify that there is data to restore you can see [[Recover user data missing after Firefox update]] [[Restore bookmarks, passwords, and data from an old Firefox profile]]