Join or Sign In

Sign in to add and modify your software

Continue with Facebook Continue with email

By joining, you agree to our Terms of Use and acknowledge the data practices in our Privacy Policy.

Mozilla Firefox Nightly for Mac

By Mozilla Free

Key Details of Mozilla Firefox Nightly

  • Get a sneak peek at our next generation web browser
  • Last updated on 09/22/20
  • There have been 4 updates within the past 6 months
  • The current version has 0 flags on VirusTotal badge_icon
Beta or prerelease software is not intended for inexperienced users, as the software may contain bugs or potentially damage your system. We strongly recommend that users exercise caution and save all mission-critical data before installing and/or using this software.

Developer's Description

Firefox browser in an early development stage that is unstable, but showcases latest features. Help us make it the best browser it can be: try Firefox Nightly. Users can expect an increase in polish from the raw, cutting edge features in our nightly builds. Nightly releases may not be as stable as beta or final releases. Experience the newest innovations in an unstable environment that's not for the faint of heart. Provide feedback on features and performance to help determine what makes the final release.

Full Specifications

What's new in version 83.0a1


Release September 22, 2020
Date Added September 22, 2020
Version 83.0a1

Operating Systems

Operating Systems Macintosh
Additional Requirements
  • macOS Catalina
  • macOS Mojave
  • macOS High Sierra
  • macOS Sierra
  • OS X El Capitan
  • OS X Yosemite


Total Downloads 16,468
Downloads Last Week 5
Report Software

Related Software

Google Chrome

Google Chrome







Best VPN Services for 2021

Best for privacy

3 months free with 1-year plan

Best for customer support

$39.99 for the first 12 months

Best for zero logs

$4.87.99/months for a 1-year plan

Best money-back guarantee

$2.99/months for a 3-year plan

User Reviews

2 User Votes
5 Star
4 Star
3 Star
2 Star
1 Star