Is that function available yet ?? , its been about 5 years
Basically I want to use my own Background Image like you can in Windows 10 Mail , since it is now Discontinued , I am back to Thunderbird after 5 years , and was hoping someone actually finished the program and you can add a background Image of your own , not just the Firefox Theme I seem to have , like go to a folder in Windows and choose a JPG image and put it as the background just like you do for a Desktop Background … Yes/No ???