Rated 1 out of 5 stars

After downloading and adding this add-on, it is listed in both Firefox and Thunderbird as being enabled, but there is no place to actually find and work with the add-on i.e. change the application (NOT the message composition) font sizes. If I can't solve this problem real soon, I'll have to kick both Firefox and Thunderbird through the goalpost of life - can't read the toolbar and message pane script in Thunderbird. Apparently the default download for Thunderbird for the latest Windows 10 is a32-bit version 52.7.0 with which nothing seems to work properly and for the default 64-bit version of Firefox for Windows 10 called "Quantum," this add-on doesn't work. Please don't bother flaming me for these comments. I do know what I'm talking about