Icon of program: MultiFirefox

MultiFirefox for Mac

  • Free
  • 3.2
    5
  • 3.5K
  • V2.3.3
Free Download for Mac

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Run multiple versions of Firefox

The release of version 3 of Firefox was one of the most awaited moments in software and download history. However, as with any new piece of software, this iteration is bound to have bugs and issues that should be corrected in the future.

MultiFirefox is an ingenious little tool for Mac that will allow you to run up to five different versions of the browser alongside each other. It can be extremely useful if you're a developer and want to see how your website appears in the different versions of the version. MultiFirefox can also be used to go back into the history of the Mozilla browser and see how the different versions evolved over the years.

The application comes with a copy of Firefox 3, which you'll have to install if you haven't done so yet. Unfortunately, you'll still have to install all the other versions that you might want to test out. Switching between versions from MultiFirefox's interface is quick and easy however the program at times fails to indicate the number of each version.

Looking to test out your website in different versions of Firefox? MultiFirefox is what you're looking for.

  • Pros

    • Run up to 5 versions simultaneously
  • Cons

    • You'll need to provide all the versions to try
 0/1

App specs

  • Developer

  • License

    Free

  • Version

    2.3.3
  • Latest update

  • Platform

    Mac

  • OS

    macOS 10.15

  • Downloads

    3.5K

    Last month's downloads

    • 4
  • Size

    919.36 KB

Program available in other languages


Icon of program: MultiFirefox

MultiFirefox for Mac

  • Free
  • 3.2
    5
  • 3.5K
  • V2.3.3
Free Download for Mac

View an ad to download for free


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Laws concerning the use of this software vary from country to country. We do not encourage or condone the use of this program if it is in violation of these laws.
Softonic

Is MultiFirefox safe?

100/100

Score result: Clean

This file passed a comprehensive security scan using VirusTotal technology. It is safe to download.

  • Virus free
  • Spyware free
  • Malware free
  • Verified by Security Partners

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Scan Info

Last scan
Thursday, May 21, 2026
Scan provider
VirusTotal · Full report

File Integrity

File
2.3.3.zip
SHA256
da08ec6b31a928549783aefcd54664fcf26e107bf09bb1d5439e769a2273b537
SHA1
33435003202cc1138ab8b3ecbdbece4fc1acdf4e

Softonic security commitment

MultiFirefox has been thoroughly scanned by our advanced security systems and verified by industry-leading partners. This file comes from the official developer and has passed all our security checks, showing no signs of viruses, malware, or spyware. For more information, visit our Security and Trust Center

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