Hi, foobarly,
late answer, and on 1.53, but I found your post just minutes before simply trying this:
add:
user_pref("kmeleon.toolband.Tabs.size", 3000);
to your user.js, if you want your tabsbar as wide as possible. It is "...toolband.Bookmarks.size" for the bookmarks and "...band.URL Bar.size" for the adress bar. Should work as long as your screen width doesn't exceed 3000px by far.
Cheers
SoerenB
Edited 1 time(s). Last edit at 02/21/2010 11:46AM by SoerenB.