On 02/06/10 14:42, users-request@lists.fedoraproject.org wrote:
Subject:
can't set Okular as helper pdf app in Firefox
From:
Claude Jones <cjoneslists@tehogeeservices.com>
Date:
Wed, 2 Jun 2010 08:42:12 -0400
To:
Community support for Fedora users <users@lists.fedoraproject.org>

This is Fedora 13 with the KDE desktop and all the latest updates:

When I click on a pdf link in Firefox, I get a message saying the helper 
application doesn't exist and to change that in preferences. In Firefox 
preferences in the Applications tab, the helper app is set to Okular. If I 
download a pdf, as opposed to clicking on the link, and then right-click and 
select open with Okular, it works fine. 

In KDE settings, the file association for pdf's is also set to Okular

Is there another place this has to be set??
  
Hi Claude,

I had this (or something pretty close to it a while back..... the assembled wisdom of the list put the problem down to the sender program  not specifying the file type correctly.  Sadly, it's something we have to live with.

HTH,

Dave