Learn how to enable and use PDF editing tools in Firefox PDF reader. You can use Free Text Annotation tool and Ink Annotation tool in Firefox.

Mozilla's latest version of Firefox conveniently includes a built-in PDF viewer. If you prefer your own PDF viewer, here's how to change it.

And, you can change your default PDF viewer for your browser by installing the Acrobat Reader browser extension. Install Adobe Acrobat Reader DC Head to the official Adobe website.

Learn how to disable or enable Two-page View mode for PDF files in Google Chrome PDF viewer, by following the instructons laid down in this post.

To edit a PDF file on your Android for free, you can use the Adobe Acrobat Reader: Edit PDF app. While you can’t modify existing text or images with a free account, you can add new text ...

Instead, you can use the free Acrobat Reader program to sign the PDF directly. In fact, Acrobat Reader gives you a few different ways to sign a PDF.

While Lion didn't wow the crowd with most of its features, it brought some amazing additions to Apple's PDF viewer/editor that puts it over the top and makes it our choice for the best.