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Is there any plugin or extension so I can view any PDF directly within Firefox 3.5 on Windows just like with Safari on a Mac?
It's annoying to always download and open the file.

So I'd like to be able to view the PDF just like a web page within the browser.

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I'm doing that all the time without plug-in. Which version of Firefox do you use? – John Smithers Jul 15 '09 at 7:44
I'm using Firefox 3.5. I've updated the question with the detail. – Marc Jul 15 '09 at 7:55
up vote 1 down vote accepted

Both Adobe and Foxit offer a web browser plugin. There are also plain viewer addons like PDFVue, but that one didn't rate particularly well.

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Oh I have the free Foxit Reader installed. Does it also have the browser plugin? Or how do I get it? I haven't found anything on their website. – Marc Jul 15 '09 at 7:56
I've read that the latest version – 3.0 – should come with an installer that can detect your web browser. Hope that helps. – Nikhil Chelliah Jul 15 '09 at 8:34

I've installed Adobe Reader. If you go to Firefox -> Options -> Applications you can select that PDFs should be shown within Firefox. Have a look, if your PDF reader is plugged-in there, too.

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Foxit reader is a really nice PDF reader and has a great working Firefox plugin

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Install Foxit and it automatically opens all pdfs... – NT. Oct 24 '09 at 17:42

Just another thought here. Firefox 17, which should launch on November 19 will have an inline pdf viewer. Therefore, you could download Firefox Beta if you don't want to wait. This allows you to have a pdf viewer without any extensions.

Obviously, this only applies to people who can and want to update their browser.

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I use PDF Download but I can't say that it's like viewing PDFs on Safari for the Mac.

(As an aside, here's my favorite PDF plugin for Firefox on the Mac.)

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I'm using PDF-XChange Viewer from Tracker Software, and really love it. First, it's free, and it has almost all the functionality you want from a pdf viewer and a pdf EDITOR. Of course, it also has browser plugins for both Firefox and IE.

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simply the finest ... +1 – Molly7244 Oct 24 '09 at 17:59

There's also a plugin avalaible from the MuPDF-Project.

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...which currently doesnt work as a plugin... but MuPDF is very fast and very lightweight as a standalone viewer. – Kurt Pfeifle Aug 15 '10 at 23:26
@pipitas: I foyu want a lightweight viewer, use SumatraPDF, it utilzies MuPDF but has everything you need. – Bobby Aug 16 '10 at 6:40
The point of my comment was: you are recommending something to work as a plugin, which it doesnt.... Also, I'm very familiar with SumatraPDF as well. (Oh, and how do you know it has "everything I need"?!??) – Kurt Pfeifle Aug 16 '10 at 13:54
@pipitas: Now I see what you mean...well, back then (Oct '09) the website stated something different, though it does work for me on 3.6.8, so I'm not sure what they mean with 'newer'. Also, as a Viewer it has everything I can imagine what might be needed. – Bobby Aug 16 '10 at 14:14
1 example of something I also need in a viewer, sometimes: being able to print from it, directly. – Kurt Pfeifle Aug 16 '10 at 22:46

The popular

The most well-known free PDF readers, which both offer a browser plug-in, are Adobe Reader and Foxit Reader.

The open source

The open-source Sumatra PDF reader is another alternative. Note: you'll have to enable the installation of the plug-in during the setup.

The plugin-free add-on

For newer versions of Firefox, an add-on which doesn't require the installation of plug-ins is also available. It's called PDF Viewer and is based upon the PDF.JS project.

It is currently available for Firefox for Android 11.0 - 16.0a1, Firefox 10.0 and later and SeaMonkey 2.7 and later.

Note: PDF plug-ins such as Adobe Reader can conflict with the add-on. You'll have to disable these via Ctrl + Shift + A > Plug-ins.

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