multifirefox

Install command:
brew install --cask multifirefox

Name: MultiFirefox

Launcher utility to run multiple versions of Firefox side-by-side

https://davemartorana.com/multifirefox/

/api/cask/multifirefox.json (JSON API)

Cask code on GitHub

Current version: 2.3.3

Analytics:

Installs (30 days)
multifirefox 11
Installs (90 days)
multifirefox 44
Installs (365 days)
multifirefox 199
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