Just about every day I need to create a new Thunderbird favorite on the Ubuntu dock. The previously created favorite does launch Thunderbird but another icon appears at the bottom, resulting in two Thunderbird icons in the dock. Is this an indication that I might have a virus or other malware. Is there a way to fix this? Thank you for your time. Thunderbird 115.12.2 (64-bit) Ubuntu 22.04.4 LTS