Firefox 21.0 Beta 4

Firefox 21.0 Beta 4 download

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Firefox together comes with an everyday set of developer tools similarly as a powerful JavaScript and CSS error/warning console, ANd associate degree optional Document Inspector that gives detailed insight regarding your pages.

What's New in Mozilla Firefox 21.0 Final?
# NEW
- The Social API now supports multiple providers
- Enhanced three-state UI for Do Not Track (DNT)
- Firefox will suggest how to improve your application startup time if needed
- Preliminary implementation of Firefox Health Report
# CHANGED
- Ability to restore removed thumbnails on New Tab Page
- CSS -moz-user-select:none selection changed to improve compatibility with -webkit-user-select:none
- Graphics related performance improvements (bug 809821)
- Removed E4X support from Spidermonkey
# DEVELOPER
- Implemented Remote Profiling
- Integrated add-on SDK loader and API libraries into Firefox
# HTML5
- Added support for

element
- Implemented scoped stylesheets
# FIXED
- Some function keys may not work when pressed
- Browsing and Download history clearing needs unification to avoid confusion on clearing download history
- Security fixes

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