TBB Automatically Chooses an Inappropriate Size for Its Main Window
TBB opens with the bottom edge of its frame beyond the lower limit of the screen in Gnome3.
This is a follow-on to Bug #11078 (closed) and is motivated by a request for additional information there.
TBB attempts to choose window dimensions from a small set so any particular user is likely to fall into the same category with many others and therefore be less identifiable. It should pick a window size that fits completely within the screen size on the user's terminal. Here is a case where it doesn't.
When the User hovers the cursor over a link, Firefox shows a pop-up box (toaster) in the lower left containing the link's URL. In the attached screen shot, only the top few pixels of that toaster are visible.
Maximizing the TBB window brings it all back into view but impacts anonymity because Firefox reports the new window size in response to server inquiries. The full-screen window size may be more or less unique to the User.