Dear Maintainer,

since a few days/weeks pdf documents do not open anymore for
me. Instead they get downloaded immediately, without iceweasel
querying, if the pdf should be downloaded or opened. When I try to
open from the download tab, iceweasel even tries to open the pdf with
krita instead of okular. When I run dolphin (KDE file browser), pdfs
open as expected in okular.

I open this issue against iceweasel, since it affects iceweasel, it is
not necessarily an iceweasel issue. Here are similar issues described

http://www.linuxquestions.org/questions/blog/the-dsc-472367/fixing-the-annoying-firefox-associations-issue-once-and-for-all-4045/

http://forums.opensuse.org/showthread.php/398397-Gimp-default-for-opening-PDF-s-from-Firefox

Thanks,
Rainer

The problem seems to be related to the settings in mimeinfo.cache, which lists
krita as first entry:

rd@blackbox:~$ grep application/pdf /usr/share/applications/mimeinfo.cache
application/pdf=kde4-krita_pdf.desktop;kde4-
okularApplication_pdf.desktop;kde4-karbon.desktop;gimp.desktop;evince-
previewer.desktop;evince.desktop;vprerex.desktop;
rd@blackbox:~$

Kind regards,
Rainer

I've noticed same problem on wheezy with latest Iceweasel.

There is upstream bug with one comment with possible walkaround, that
worked for me:
https://bugzilla.mozilla.org/show_bug.cgi?id=727422#c24

Basically one has to change pdf association settings other then Okular,
apply settings, and then revert back to Okular and apply again.