: Before downgrading, manually back up your bookmarks and passwords, as they may be lost or inaccessible in older versions. Risks of Using Outdated Browsers
Hunting for an old version of Firefox is like trying to find a vintage comic book: it’s definitely cool for the nostalgia, but you have to be careful with the "condition" of its security. download mozilla firefox old version
Mozilla maintains an official archive of all its previous releases. You should only download older versions from this official source to avoid malware from third-party sites. Mozilla Support Access the Official Archive : Navigate to the Mozilla FTP Server Select Your Version : Browse the numbered folders (e.g., ) to find the specific version you need. Choose Your Platform : Select the folder for your operating system: for Windows. for macOS. linux-x86_64/ for Linux. Select Your Language : Choose your regional code folder (e.g., for American English). Download the Installer : Click the (Windows) or (Mac) file to start the download. mozilla.org Important Precautions Before Installing : Before downgrading, manually back up your bookmarks
| Version | Release Year | Notable Features | Best For | | :--- | :--- | :--- | :--- | | | 2010 | Classic UI, Personas themes, Windows XP support | Extremely old hardware | | Firefox 28 | 2014 | Last version supporting Windows 2000/XP RTM | Corporate legacy apps | | Firefox 45 ESR | 2016 | Extended Support Release (last XP-compatible ESR) | Long-term stability on XP/Vista | | Firefox 47 | 2016 | Last version for OS X 10.7-10.8 | Older Macs | | Firefox 56 | 2017 | Last version with full legacy add-on support (XUL/XPCOM) | Add-on preservation | | Firefox 60 ESR | 2018 | Quantum engine but older policy options | Business deployments | | Firefox 78 ESR | 2020 | Last ESR for Windows 7/8 | Unsupported OS workarounds | You should only download older versions from this
If you're having trouble finding an old version of Firefox on the Mozilla FTP site, you can try the following alternative sources:
: Click the link ending in .exe (Windows) or .dmg (Mac) to start the download. Essential Installation Steps