Reducing size of text in Firefox sidebar - possible?

Wed Nov 18 16:30:26 UTC 2009

* Chris G <cl at isbd.net> [2009-11-18 15:40 +0000]:
> Is it possible to reduce the size of text in Firefox's sidebar
> (version 3.5.5) without reducing the size of text elsewhere?  I want
> to use the Bookmarks in the Sidebar feature but find the text rather
> too large.

My guess is something in 'userChrome.css'.  Seems to be some clues in
the linked discussion.

<http://firefox.exxile.net/forum/viewtopic.php?t=6572&sid=05f02231808f53afcb0c81507e40a7ac>