The strangest thing is that it doesn't always occur in same part of the firefox/thunderbird window. Sometime in the main window, sometime on the lateral window (thunderbird obviously), sometime on menu part (where are bookmarks, menus, url etc...)
The strangest thing is that it doesn't always occur in same part of the firefox/thunderbird window. Sometime in the main window, sometime on the lateral window (thunderbird obviously), sometime on menu part (where are bookmarks, menus, url etc...)