944899 - PDF doesn't open in PDF.js viewer, but offers the open/save dialog box instead

Status: RESOLVED INVALID

(Firefox :: PDF Viewer, defect)

Description

[Daniel]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0 (Beta/Release)
Build ID: 20131129053350

Steps to reproduce:

I tried to open www.pjrc.com/teensy/K20P64M50SF0RM.pdf (or any other pdf).


Actual results:

The save/open dialog box appears.


Expected results:

The pdf should have been displayed in the built in viewer.

This happens in safe mode as well, but not with a fresh profile.

What might be the cause of this?

Comment 1

[Daniel]

One odd thing is that my secondary profile (which I almost never use) is affected as well, and that it happens in both current Nightly (2013-11-29) and in release Firefox (25.0.1).

Comment 2

[Loic]

This PDF is pretty heavy (1227 pages) so, I guess on some low machines, Firefox fails to display it and offers only to download it.

Comment 3

[Daniel]

(In reply to Loic from comment #2)
> This PDF is pretty heavy (1227 pages) so, I guess on some low machines,
> Firefox fails to display it and offers only to download it.

Well, that might be true but it's not what happens here. As I said it works fine with a fresh profile, and it's also independent of pdf-file (same behaviour with e.g. http://www.rosamondgiffordzoo.org/assets/uploads/animals/pdf/RedPanda.pdf).

Comment 4

[Loic]

Perf of the PDF viewer can be affected heavily if you have disabled HWA in your current profile.
https://support.mozilla.org/en-US/kb/forum-response-disable-hardware-acceleration

Is it the case?

Comment 5

[Daniel]

HWA is enabled. I don't think this is a perf problem.

Comment 6

[Brendan Dahl [:bdahl]]

Seems fine for me. Check your Tools->Options->Applications for the pdf mimetype and make sure it points to "Preview in Firefox." You may want to try wiping out your mimetypes.rdf file.

Comment 7

[Daniel]

Thank you! That was it. Somehow that preference had been changed.