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Download Firefox 21.0

Firefox  21.0

By Mozilla Organization  (Open Source)
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# 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 <main> 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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