Viewing PDF in Firefox issue

I was wondering if anybody had any helpful information about how to view a PDF in Firefox. The web site that I use for school to access all of my class lecture notes is all in PDF format and I have no problem viewing the files in Safari but when I use Firefox I am forced to download everything before I can view it. I checked in preferences and the box that says "view in browser using Adobe Reader" is checked so aside from that I am not sure what else I should be looking for. I know that it may seem like the simplest thing to do here would be to just use Safari but for some reason this particular web site does a browser check when you open it and it says that Safari is not a supported browser.
Thanks to anybody who can help me figure this out!

Whether you know it or not, you have to download a PDF before you can view it; the only difference is that safari is doing a bunch of stuff in the background, and then displays the PDF in the browser window - but without any of the PDF viewer controls.
The bad news is that Mac users are second class citizens when it comes to Firefox; for in-line PDF viewing from Firefox, you have to have a PDF plugin for Mozilla and its family of browsers. Without such a plugin (I know they exist for Windows & Linux... don't know about Mac), you have to download the PDF, and then view it.
Preview doesn't provide this plugin, as Safari other WebKit browsers don't need it. I don't have Adobe's acrobat reader installed, so I can't say if it has a mozilla/firefox plugin.
If you absolutely must view the PDF from the browser for some unfathomable reason (I personally don't see the advantage of having all the pdf viewing controls missing), you can give OmniWeb a try - with OmniWeb, you can set a site-specific preference that will identify the browser as pretty much whatever you want - IE, Safari, Mozilla/Firefox.

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Since upgrading to FireFox 4 I can no longer view pdfs in firefox. I have to switch to IE to view these pdf files.

since upgrading to FireFox 4 I am unable to access pdf online. It takes me to a New Tab which is blank. I have no problem viewing and downloading these files using IE.

https://support.mozilla.com/en-US/kb/Using+the+Adobe+Reader+plugin+with+Firefox
https://support.mozilla.com/en-US/kb/Opening+PDF+files+within+Firefox

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Hi there!
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Hello lolapop21,
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*http://kb.mozillazine.org/about:config
*https://support.mozilla.org/kb/view-pdf-files-firefox-without-downloading-them

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Hi karenwfrazier,
Try [http://support.mozilla.org/en-US/kb/view-pdf-files-firefox-without-downloading-them#w_reset-download-actions Reset download actions] and check it again.
If the above did not solve the issue try [https://support.mozilla.org/en-US/kb/troubleshoot-issues-with-plugins-fix-problems#w_re-initializing-the-plugins-database Re-initializing the plugins database] .
see also : [http://helpx.adobe.com/acrobat/kb/cant-view-pdf-web.html Can't view PDF on the web]
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Hi karenwfrazier,
Try [http://support.mozilla.org/en-US/kb/view-pdf-files-firefox-without-downloading-them#w_reset-download-actions Reset download actions] and check it again.
If the above did not solve the issue try [https://support.mozilla.org/en-US/kb/troubleshoot-issues-with-plugins-fix-problems#w_re-initializing-the-plugins-database Re-initializing the plugins database] .
see also : [http://helpx.adobe.com/acrobat/kb/cant-view-pdf-web.html Can't view PDF on the web]
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Adobe: Version 9.1.3
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After troublshooting this for the entire day today the issue seems to be a MIME problem.
If everything is woking perfectly, in Tools > Options > Applications...
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msiexec /a AcroRead.msi /p AdbeRdrUpd912_all_incr.msp
msiexec /a AcroRead.msi /p AdbeRdrUpd913_all_incr.msp
I then uploaded that to my network share, unlinked my group policy, made a new group policy, added a batch file to delete adobe.com from program file and the desktop on system startup even though my MST was supposed to take care of that - it's not a perfect world is it? :-)
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It's hard to tell what one thing tweaked it out or what combination of things tweaked out the install. I did also reinstall Adobe 8.1.5 and FF 3.0.10 before doing all this since our machines currently have that setup, I'm not sure if that affected it either, it's just hard to tell but I don't think it did simply because I had done that several times in troubleshooting this issue.
If anyone else has more specifics that would be great!

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Old Toad:
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== This happened ==
Every time Firefox opened
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http://support.mozilla.com/en-US/kb/Opening+PDF+files+within+Firefox
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