Mozilla Thunderbird's message list, mailbox list, and headers use a font size that is so large, I can barely see any content in the message preview pane. I'd like to reduce these to 10px, and reduce the headers to 8px or less. How can I do this?
Thunderbird is written is XUL. It's Mozilla's markup language, and it's powered by XULRunner. Basically, it's GUI-oriented XML.
The thing that styles the whole application is actually just a simple
Blender's answer pointed me in the right direction. I didn't actually modify those files, but what I did instead was created a file
Analyzing the files from Blender's answer showed me that the following are the CSS selectors I wanted:
There's a lot more interesting stuff in those files: