on 17 Feb, 2021 11:45 PM
The one of the second link is working. Is it possible to import my user folder of Firefox 781.7.1esr? I'm using directly my profile xxxxxxx.default, the Bookmarks windows is not working anymore. Actually I've used an old profile of Firefox 29, but even this didn't accept my passwords. YouTube won't work, everything is grey. After a clean run it works.
The user profiles of FF29, FF78 and TenFourFox (=FF45) have very limited compatibility, practically speaking: none. The easiest way would be to export your bookmarks from FF78 (to html), the re-import them to TenFourFox. As for passwords – you can click 'show passwords' in the password manager and then note them down or copy them.