名称 bachmaj
位置 PA, USA
职业 teacher
注册时间 July 23, 2020
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Theme Font & Size Changer for ThunderBird


Was great. Stop complaining about it being gone. Research and fix the problem yourself.


"Use the userChrome.css file for both Thunderbird and Firefox on my Linux boxes, since support for this add-on in Linux was dropped some time ago.

Create a folder in your Firefox profile named chrome

In this folder, create a text file named userChrome.css

In that file place the following code:

* Do not remove the @namespace line -- it's required for correct functioning
@namespace url(""); /* set default namespace to XUL */

* Make all the default font sizes 9 pt:
* { font-size: 9pt !important; }
Obviously, edit that font-size: 9pt !important; to a value that suits you. I generally use the same point size as was selected in the OS's desktop settings. You can also set the font face here, e.g.

* Make all the default font sizes 9 pt:
* {
font-size: 9pt !important;
font-family: Arial !important;
A similar file named userContent.css in the same chrome folder can be used to set the size of the content of webpages (and of email if used with Thunderbird.)"