I've installed a new version of Ubuntu Linux and - as recommended on this page's FAQs - backed up my firefox profile, than copied it into the profile folder on the new os. Now Firefox tells me "You've launched an older version of firefox" and forces me to create a new profile :( Also loading the old profile in "about:profiles" leads to the same result How can i restore at least my passwords? (When i try to copy only 4.db and logins.json from the old to the new profile, i get the same result) I can't find an "import old profile"-function anywhere...