User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/15.0 Firefox/15.0a1 Build ID: 20120529052711 Steps to reproduce: Attempting to view PDF files from County Register of Deeds brings up a new default PDF viewer that does not work correctly, or acceptably and can't(?) be overridden. Actual results: Ff15 appears to insist on using its own PDF viewer which has no scroll bars. There is no way to view the bottom half of pages -- resizing gives unacceptable roach-sized text. When a document arrives, the viewer sometimes, very briefly flashes a red bar with "Error" (not sure of actual text as it's too fast). Expected results: Tried to find a setting to override this viewer to no avail. Reset the extensions.uriloader@pdf.js.database variable; but it just comes back. How do I select the PDF viewer of _my_ choice? This new one feels like pre-alpha code... :P

nope, there will be a about:config entry to turn it off, but IIRC it is not implemented yet.

https://bugzilla.mozilla.org/show_bug.cgi?id=738674 https://bugzilla.mozilla.org/show_bug.cgi?id=752676 https://bugzilla.mozilla.org/show_bug.cgi?id=714712