The reason I think this is a bug is because if the Firefox window is *minimized* then it gets brought to the foreground and receives focus. Note that this behaviour is not specific to Thunderbird either. Launching a Firefox window from terminal with 'firefox page.html' also exhibits the same behaviour.
The reason I think this is a bug is because if the Firefox window is *minimized* then it gets brought to the foreground and receives focus. Note that this behaviour is not specific to Thunderbird either. Launching a Firefox window from terminal with 'firefox page.html' also exhibits the same behaviour.