Mozilla Firefox 19 is a web browser developed by Mozilla Foundation , available for download in full install version for Windows platforms from legacy sources. This version of Firefox was officially released on 2013-02-19 for public access and a brief summary of important updates and change log pertaining to this edition can be read below.

One major addon to Firefox 19 release is native PDF viewer. Now you can quickly read PDF files from websites with out downloading or even if none of  PDF readers are installed in your system.

With the new HTML scaling algorithm in place, Firefox now render better image quality while displaying images from websites. Apart from optimizing startup performance, now Firefox let the Canvas elements to export their content as image blob.

Bugs from previous editions fixed in this version including incorrect rejection of WebGL drawing, incorrect display of Private browsing with startup flag, and HiDPI mode scrolling rendering error.