Download Old Version Firefox 'link'

Old versions will corrupt modern Firefox profiles.

Downloading an old version of Firefox (often called "downgrading") is a viable solution for specific technical needs, such as using legacy extensions that no longer work or testing web development on older browser engines. download old version firefox

While Mozilla generally recommends using the latest version of Firefox for security, there are times when you might need to download an old version—such as for testing legacy web applications, supporting older operating systems, or recovering a specific removed feature. Where to Download Old Versions of Firefox Old versions will corrupt modern Firefox profiles

Run the downloaded installer. If you get a "Downgrade Protection" prompt, you may need to create a new profile to proceed. How to Prevent Firefox from Updating Automatically Where to Download Old Versions of Firefox Run

: Select win32/ or win64/ for Windows, mac/ for macOS, or linux-x86_64/ for Linux.

Do download from random third-party sites. Use official or well-known repositories: