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Firefox for Mac

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Download Firefox 42.0

Firefox 42.0

  -  76.41 MB  -  Freeware
  • Latest Version:

    Firefox 120.0.1

  • Requirements:

    Mac OS X

  • User Rating:

    Click to vote
  • Author / Product:

    Mozilla Organization / Firefox for Mac

  • Old Versions:

  • Filename:

    Firefox 42.0.dmg

  • MD5 Checksum:


Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system. Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of Firefox 42.0.

For those interested in downloading the most recent release of Firefox for Mac or reading our review, simply click here.

All old versions distributed on our website are completely virus-free and available for download at no cost.

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If you have any questions or ideas that you want to share with us - head over to our Contact page and let us know. We value your feedback!

  • Firefox 42.0 Screenshots

    The images below have been resized. Click on them to view the screenshots in full size.

What's new in this version:

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

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

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

- View HTML source in a tab
- 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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