Firefox 42

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Download: Firefox 42 English

Download: Firefox 42 ภาษาไทย

What’s New

NEW Private Browsing with Tracking Protection blocks certain Web elements that could be used to record your behavior across sites
NEW Control Center that contains site security and privacy controls
NEW Indicator added to tabs that play audio with one-click muting

NEW WebRTC improvements:
IPV6 support
Preferences for controlling ICE candidate generation and IP exposure
Hooks for extensions to allow/deny createOffer/Answer
Improved ability for applications to monitor and control which devices are used in getUserMedia

NEW Login Manager improvements:
Improved heuristics to save usernames and passwords
Edit and show all logins in line, Copy/Paste usernames/passwords from the Context menu
Migration imports your passwords to Firefox from Google Chrome for Windows and Internet Explorer; import anytime from the Login Manager

CHANGED Improved performance on interactive websites that trigger a lot of restyles

HTML5 Implemented ES6 Reflect
HTML5 Support ImageBitmap and createImageBitmap()
HTML5 Media Source Extension for HTML5 video available for all sites

DEVELOPER View HTML source in a tab
DEVELOPER Remote website debugging over WiFi (no USB cable or ADB needed)
DEVELOPER Asynchronous call stacks now allow web developers to follow the code flow through setTimeout, DOM event handlers, and Promise handlers.
DEVELOPER Configurable Firefox OS Simulator in WebIDE, to simulate reference devices like phones, tablets, even TVs
DEVELOPER CSS filter presets in the Inspector
DEVELOPER Ability to save filter presets inside CSS Filter Tooltip

FIXED Various security fixes


Known Issues
UNRESOLVED URLs containing a Unicode-format Internationalized Domain Name (IDN) are not redirected properly, leading to a Server Not Found error.