More HTML 5 & CSS elements support added (CSS CSS viewport percentage length units, full width support in CSS Text transform, etc).Here goes main points of release notes of Mozilla Firefox 19:

In addition, it’ll now be able to display pdf content on the web without prompting for any third-party plugin or downloading the pdf file. Just select Firefox as default program for pdf viewing to try this. So with built-in pdf viewer in Firefox 19, you can even open locally stored pdf files with the browser. we’ll now be able to use Firefox browser to view pdf files on the web as well as on computer without the need to download any pdf plugin for the browser.

With Firefox 19, we also get native pdf viewer i.e. But, we can now expect faster firefox startup as the browser will first display its window and then execute any other codes. Its slow start was confusing that led users to click on firefox program icon repeatedly, this caused several firefox windows as final result. On previous versions, Firefox used to start up slow. The most noticeable improvement is in terms of startup time of this browser. for regular users as it is released for windows, linux, mac pcs and android phones. Firefox 19 is now available on release channel i.e.

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