System Tray icon far too small, dot-like

[ghost]

Linux Mint 18.3, whatever KDE is current in the official repos, Thundebird 60.2.1

It doesn't let me know there's new mail unless I'm there to see the pop-up notification that happens only once just as the message arrives. Otherwise it always looks the same- like Earth from Mars.

Screenshot of system tray, is upper left icon:

https://files.catbox.moe/pxgeni.png

[ysard]

Thank you for your report, it is a bug difficult to understand and difficult to fix. The program is supposed to recover the icon of Thunderbird itself. The library unfortunately uses functions whose support seems rather random depending on the systems...