The New Hotness

If you want to change the font in all of Thunderbird’s UI, you must perform this magic ritual:

• Create the file chrome/userChrome.css in wherever they’ve hidden your profile folder (for Ubuntu 14.04, it’s ~/.thunderbird)
• Then put this incantation inside:

/* Global UI font */
/* may need !important on each entry */
* { font-size: 14pt ;
  font-family: Arial Narrow ;
}

As nearly as I can tell, you don’t need the !important tag on the top-level entry, but I don’t profess to grok Mozilla-flavored CSS.

Useful properties:

• font-weight: normal | bold | light
• font-style: normal | italic | oblique

Maybe you can do the whole font thing in one shot, but I haven’t tried.

The changes take effect the next time you fire up Thunderbird: dinking with this stuff gets tedious.

This is way too intricate for mere mortals…