I think I have a bug to report: When I browse a website with an embedded PDF viewer (must be a Firefox default viewer because I haven't installed any other plug-ins), a notification bar on top of the website (right under the bookmark bar) pops up saying (translated from German): [Icon: ?] The PDF-document is not displayed correctly. [Button: "view with other app"] [Button: "x" for closing the bar]. The PDF viewer works, so the error seems unneccessary, but what really bothers me is that the bar can't be closed. Clicking the X-button on the very right doesn't work - the bar frozen until I restart the browser or close the tab. This problem exists already since summer, so at least for 2 or more updates.