A workround is: - go to folder .thunderbird/YOURTHUNDERBIRDPROFILE.default/extensions/{YOUR_UUID_FIRETRAY_PROFILE}/chrome/skin/icons/linux/hicolor/22x22/apps - delete the png images of installed mozilla products - restart Thunderbird
Verified on ubuntu 16.04 LTS + Thunderbird 52.1.1 (64 bit) + FireTray 0.6.1 .
A workround is: YOURTHUNDERBIRD PROFILE. default/ extensions/ {YOUR_UUID_ FIRETRAY_ PROFILE} /chrome/ skin/icons/ linux/hicolor/ 22x22/apps
- go to folder .thunderbird/
- delete the png images of installed mozilla products
- restart Thunderbird
Verified on ubuntu 16.04 LTS + Thunderbird 52.1.1 (64 bit) + FireTray 0.6.1 .