[How to] Change window font in Thunder bird in Ubuntu

This is not to change font settings for the message text. This is to change the menu fonts in Thunderbird.

In Ubuntu, you will have ~/.thunderbird or ~/.mozilla-thunderbird created when the program is installed. This is called profile folder.

1. Go to your profile folder
2. Find a folder named chrome under your profile folder directly. If not available, create one.
3. Inside the chrome folder, create a file named userChrome.css . The capitalization should be as it is mentioned here.
4. Paste the following code into it. Save and restart thunderbird. You can see the change.
5. You can change the font settings as you desire.

Code:

/* Global UI font */

* { font-size: 8pt !important;

  font-family: Verdana !important; 

} 

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