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How to Open PDF in Firefox in Mac OS X

Want to know how to open PDF in Firefox on Mac OS X? Here is the tutorial for easily and conveniently open PDF in Firefox on Mac.

Emily Xiao
Posted by Emily Xiao | @Emily Xiao | Category: PDF Reading Tips
Published: May 15,2015 16:11 pm / Updated: Aug 03,2015 15:42 pm

Have you always encountered the situation that every time you click a link in Firefox, of course, the link is a PDF file, the PDF is downloaded to your Mac automatically instead of opened in the Firefox? And what's worse, the downloaded PDF might not be the one you needed? You should know that to open PDF in Firefox directly, you need have the corresponding Firefox add-on plug-in) installed. In this article, we're going to talk about how to use Firefox to open PDF in Mac.

First and for the most, as I have mentioned one Firefox add-on is needed here, so you need to download and add the add-on to the Firefox.

If you're using Firefox 3, get the add-on in this way. Launch Firefox and navigate to "Tools>Add-ons. In the search box, you need to type in the name of the add-on— "PDF plugin for firefox in Mac X 1.1.3". Then a dialogue box could appear with the add-on and a button "Add to Firefox". Click the button to add the add-on to your Firefox.

open PDF in FireFox in Mac

If you're using Firefox 4, get the the PDF Browser Plugin from the site: www.schubert-it.com/pluginpdf. Download and install the plugin.

open PDF in FireFox in Mac

Then here is the miracle. Whenever you encounter PDFs in Firefox in Mac, you can open them with one click. Let's take a look at how it works.

In Google Search box, type in these words "how to edit on excel 2007". To ensure the file you open are PDF files, add "filetype:PDF" after "how to edit on excel 2007". Then click the "Advanced search". Let's click the first link "What's new in excel 2007 Quick Source Guide". See what happens? The PDF is automatically open in Firefox, right?

Firefox has been frequently upgraded, while the add-ons are not developed for the upgrade on time. In that case, you'd better search for the add-on for your Firefox via Firefox itself. Namely go to the "Tools>Add-ons", in the search box type in the keywords. Firefox could find suitable add-ons for you automatically.

I have to admit that more add-ons for Windows PC are developed for Firefox than for Mac. But there are still hundreds of fantastic add-ons for Mac you can make most of.


If you find the PDF opened in Firefox is what you need, you will read it carefully, right? When you read the PDF, you might need to add comments, annotations or simple just take notes. If so, try Wondershare PDFelement, a powerful, yet affordable PDF tool that allows you to add sticky note, text box, all kinds of shapes, highlight, strikethrough and underline PDF text. 

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