Any ideas how to fix that? I do have the Microsoft fonts installed, if that makes a difference.
A second and unrelated but still annoying issue I've run into with Firefox on Ubuntu is that it doesn't seem to read my userChrome.css file properly. I'm trying to implement this fix to remove those ugly space-wasting down arrows in my Bookmarks Toolbar folders (which you can see in the above screenshot), but Firefox just seems to be ignoring my newly-created userChrome.css file entirely. The file lives at the following path:
...but Firefox just seems to ignore it.
Any help on either of these issues would be super-appreciated. Thanks!