Firefox PDF reader for Firefox Web browser might just be the add-on that put Adobe’s acrobat PDF reader out of business.

When surfing a website, encountering a PDF file is one of those minor annoyances I wish I did not have to deal with. That’s because it interrupts the Web experience. With the release of a built-in PDF reader for Firefox by the Mozilla Foundation, such interruptions are now history.

When installed and enabled, the PDF reader enables Firefox to render a PDF just like a regular Web page. No need to launch Adobe’s PDF Reader or save it to your computer, unless that’s what you want to do.

You may read the release announcement here.

The built-in PDF reader is an add-on, so installing it follows the same procedure as that of any other Firefox add-on. From the menu, click on Tools > Add-ons. In the Add-ons window, search for “pdf reader.” Install it.
Firefox PDF Reader Built-in

It should now appear in the Extension tab. Now, you may uninstall Adobe’s PDF reader from your computer.
Firefox PDF Reader Built-in Extension