Version History of Mozilla Firefox 17.0

• NEW - First revision of the Social API and support for Facebook Messenger
• NEW - Click-to-play blocklisting implemented to prevent vulnerable plugin versions from running without the user's permission (see blog post)
• CHANGED - Updated Awesome Bar experience with larger icons
• CHANGED - Mac OS X 10.5 is no longer supported
• DEVELOPER - JavaScript Maps and Sets are now iterable
• DEVELOPER - SVG FillPaint and StrokePaint implemented
• DEVELOPER - Improvements that make the Web Console, Debugger and Developer Toolbar faster and easier to use
• DEVELOPER - New Markup panel in the Page Inspector allows easy editing of the DOM
• HTML5 - Sandbox attribute for iframes implemented, enabling increased security
• FIXED - Over twenty performance improvements, including fixes around the New Tab page
• FIXED - Pointer lock doesn't work in web apps (769150)
• FIXED - Page scrolling on sites with fixed headers (780345)