I'm running CentOS 5.6 (32 bit) with Firefox 38 and trying to use mozplugger to embed pdf files (using evince). Initially it couldn't open the pdf "file not found". Now it is downloading the pdf, but not displaying it. I have to click on the arrow icon to "displays the progress of downloads". How do I get the pdf to automatically display in the embedded window, when I click a pdf link, instead of just downloading? I've been researching and troubleshooting for quite some time. Any help would be greatly appreciated.

you are aware that

5.6 is UNSUPPORTED
5.7 is UNSUPPORTED
5.8 is UNSUPPORTED
5.9 is UNSUPPORTED
5.10 is UNSUPPORTED
and that the only supported version in the OLD legacy support CentOS 5 series is the current 5.11

mozplugger ?
did not that get discontinued back in 2005

Thank you John for responding. I'm unable to update my version of CentOS at this time, for a number of reasons. I have to update my version of Firefox immediately, due to a requirement from a vendor website. I don't believe mozplugger is discontinued, but ultimately the reason I'm trying to use mozplugger is because when I use the built in pdf viewer in Firefox 38, it looks good on the screen, but it won't print pdf documents landscape. I believe mozplugger may solve this issue, because I can embed evince, which doesn't have the printing problem. Thanks again for the response.

cent uses the default installed Evince for PDF's
and the portrait/ landscape settings are in your printer settings ( CUPS ) and NOT on the pdf viewer or web browser