Different strings shown on the top panel and on the application menu panel
At present the application title shown on the top panel and on the application title panel are different. This can be seen for applications like Firefox and Thunderbird.
In the case of Firefox, this is the case where in the Top Panel - "Firefox Web Browser" and in the Application Title - "Mozilla Firefox" is shown. This is also similar to Thunderbird where in the Top Panel - "Thunderbird Mail" and in the Application Title - "Mozilla Thunderbird" is shown.
This bug is not critical but still is an imperfection. See attached screenshot.