That looks like the default Pocillo theme. The separator is deliberately not visible in the default theme with a light background since it spoils the overall look.
** Changed in: budgie-desktop (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of ubuntu budgie bug busters, which is subscribed to budgie-desktop in Ubuntu. https://bugs.launchpad.net/bugs/1917304 Title: Firefox bookmark separators not showing in budgie Status in acroread package in Ubuntu: Invalid Status in budgie-desktop package in Ubuntu: Invalid Bug description: In Ubuntu Budgie 20.04.2, bookmarks separators do not appear within Firefox bookmarks menu. This issue is being logged against Budgie, rather than Firefox because it does not appear in other variants of Ubuntu 20.04.2 (e.g. "standard"/GNOME, Ubuntu-Mate, Lubuntu) How to reproduce: Launch Firefox Go to Customize Make sure Menu bar is enabled Save settings Go to Bookmarks - Show All Bookmarks Verify that the bookmarks menu area shows several bookmarks/folders and separators (create them if they don't exist.) Open the Bookmarks menu and see that no separators appear Versions installed: budgie-desktop-environment 0.13.7 ubuntu-budgie-desktop 0.65 firefox 86.0+build3-0ubuntu0.20.04.1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/acroread/+bug/1917304/+subscriptions -- Mailing list: https://launchpad.net/~budgie-remix-bug-busters Post to : budgie-remix-bug-busters@lists.launchpad.net Unsubscribe : https://launchpad.net/~budgie-remix-bug-busters More help : https://help.launchpad.net/ListHelp