FYI, Mozilla bug 1695575 for Firefox:
With x11-fonts/google-fonts (Google fonts) for FreeBSD: showing the
bookmarks toolbar and personal-toolbar-empty, whilst the bar is used for
items other than bookmarks toolbar items, can make the UI too wide for
the window
tl;dr a very weird bug that bit one of my Firefox profiles a few months
ago.
We closed the bug after symptoms disappeared without explanation. The
original cause of the bug was unknown.
Now (today) <https://bugzilla.mozilla.org/show_bug.cgi?id=1695575#c20>
it seems that recurrence of the bug was triggered by installation of
x11-fonts/google-fonts and its dependencies.
No need to reply; follow the Mozilla bug, if you like.
(I do have some questions about fonts and related package message on
FreeBSD, but these can be addressed to FreeBSD Forums.)
Kind regards
Graham