I had about 60 tabs opened and my after restarting firefox and upgrading to the new version I lost all my previous tabs. I did everything the help page suggested and then I search the internet and did the following after someone suggested this: You can visit the directory %appdata%\Mozilla\Firefox\Profiles, open the folder <random characters>.default, and open the file sessionstore.js with a text editor (such as Notepad), then copy-and-paste the URLs, representing the websites that were open before closing the browser, found in that file into your browser. A bit tedious, but it will work in a pinch. However when I opened the file in notepad, I got only a blank page, nothing came up. Please let me know how I can retrieve my tabs. Thank you so much. I appreciate your help!!!!