>>714504483>tabsYou mean you just never close web pages...?
Maybe just bookmark all open tabs, export the bookmarks, and then open the bookmarks after you import them on the new OS.
Whether there's a better way to do what you want is still more of a browser question than an OS question. You're right that copying the browser's entire configuration file structure PROBABLY won't work, because that is something that may differ by OS version, so either the browser has a feature to export tabs or it doesn't.