Let user delete default folders in bookmarks

[JonDous]

Please let to delete default folders. I use Firefox only for mobile. What for should i see "desktop bookmarks" in my bookmarks?

Let us to delete or hide. Also to hide "tabs on other device". Why should I see them? My Firefox was updated on the same phone but now i see "tabs on mydevice". But I still using the same device, just updated Firefox.
Not everyone wants to see these tabs and bookmarks. We need more flexibility.

┆Issue is synchronized with this Jira Task

[onemahon]

Moved to bugzilla: https://bugzilla.mozilla.org/show_bug.cgi?id=1811813

Change performed by the Move to Bugzilla add-on.