Firefox 43.0 Beta 1

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Managing Browser Add-Ons In Mozilla Firefox

Filename: Firefox Setup 43.0b1.exe

File size: 41.47MB (43,485,128 bytes)

Requirements: Windows 2000 / XP / Vista / Windows7 / XP64 / Vista64 / Windows7 64 / Windows8 / Windows8 64

Languages: Multiple languages

License: Open Source

Date added: November 5, 2015

Author: Mozilla Organization

MD5 Checksum: F65165519692BC1C51F003985B75F39D

Download Links

Old Version

What’s New By Official Website

  • 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


    Improved performance on interactive websites that trigger a lot of restyles

  • HTML5

    Implemented ES6 Reflect

  • HTML5

  • HTML5

    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


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