This isn't the whole answer, but regarding passwords, this popped up in a web search: [https://support.avast.com/en-us/article/export-mozilla-firefox-passwords-data/#pc How to import passwords data into Firefox | Avast] After doing the export, you'll notice two headings in the middle of the instructions. You'll need to switch to this one to continue: "Enable password import in Firefox" There probably is an article on bookmarks, too.