You can just copy the session file to your new computer. see my screenshot of example files and you can pick the date from your files you want to use. You will should have similar files in your profile folder'''(on both computers)''' in a folder name '''sessionstore-backups'''. On the old computer, with Firefox closed, copy and then move the session file you want to use to your new computer in the profile folder. Then rename it to '''sessionstore.jsonlz4'''. Either delete or overwrite the current file in the folder with the same name. '''May the Schwartz be with you!!! ;-))'''