Firefox 21 FINAL 2013

Not
everyone gets by with the default browser on their computer, and when
it comes to picking an alternative, Firefox is one of the most popular
out there, having clawed back support from upstart rivals like Google
Chrome and Opera in recent years by switching to a rapid release cycle,
ensuring major new versions of the browser are released every six weeks.

It’s
true to say that individual updates often fail to deliver anything
substantial, but cumulatively they roll together to produce a web
browser that is radically different to the one – version 4 – that marked
the start of a new era back in 2011.

Some of the landmark new
features we’ve seen include a per-site Permissions Manager, enhanced
Sync options, tabs on demand, silent updates and add-on enhancements. We
also saw the launch of specific development branches including UX,
which has led to various interface tweaks such as redesigned home and
new pages (Firefox 13), and ‘Elm’, a branch designed to provide Firefox
in Modern UI form for Windows 8.

One group particularly well
served by the rapid release cycle have been developers, and a plethora
of tools from Javascript Scratchpad (Firefox 6) to full-blown Developer
Toolbar (Firefox 16) have worked their way into successive builds as
Firefox courts this important community of users.

And
underpinning this all are a constantly evolving set of performance
improvements, standards support (HTML5 and CSS3 are constantly being
added to, for instance) and bug fixes.

Firefox 21 is now in the stable channel.

What’s
new in version 21? The latest version adds an application startup time
advisor and preliminary support for the new Firefox Health Report, as
well as various graphic improvements.

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