All the questions so far have been use Sync. This is not an option. The solution has to be local to the device. On the Linux desktop version of Mozilla, I would simply goto $HOME/.mozilla/firefox and backup my profile directory. Or I would goto Bookmarks > Show All Bookmarks > Import and Backup. It is super fast and easy and an absolute necessity to preserve one's bookmarks locally quickly. There are all sorts of reasons one needs to save a copy of their bookmarks at any time locally. Bottom line, preservation of user's data should be the ultimate goal. In Androids Settings > Apps > Firefox > Storage > Change, I've seleted SD Card. On the SD Card there is a common directory /storage/0000-0000/Android/data/com.mozilla.firefox/. This would be the location to Export Bookmarks too. These files can be accessed with a general file manager or Termux. This is probably more a feature request than support question. I would prefer Firefox for Android had an Export option like the desktop versions, but it is my understanding now, as-is, users have to root their device to backup their data. Anyone go this route?