Mozilla Firefox 42.0 Beta 7 发布

Private Browsing with Tracking Protection blocks certain Web elements that could be used to record your behavior across sites

Indicator added to tabs that play audio with one-click muting (Adobe Flash supported since version 19)

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 Windows Chrome and IE; import anytime from the Login Manager

Control Center that contains site security and privacy controls

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

Improved performance on interactive websites that trigger a lot of restyles

Implemented ES6 Reflect

Support ImageBitmap and createImageBitmap()

Media Source Extension for HTML5 video available for all sites

Remote website debugging over WiFi (no USB cable or ADB needed)

Asynchronous call stacks now allow web developers to follow the code flow through setTimeout, DOM event handlers, and Promise handlers.

Configurable Firefox OS Simulator in WebIDE, to simulate reference devices like phones, tablets, even TVs

CSS filter presets in the Inspector

Ability to save filter presets inside CSS Filter Tooltip

View HTML source in a tab