Windows 10 and Firefox: Still Supported, But For How Long?

If you’re a Firefox user on Windows 10, you may be wondering how long your browser will remain supported as Microsoft moves toward ending updates for this operating system. With Windows 10 reaching End of Support (EOS) on October 14, 2025, the clock is ticking — but Mozilla is giving users some breathing room.

Let’s dive into what this means for Firefox users, how this compares to Windows 7 support, and what you should do to prepare.

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Quick Read (Summary)

• ✅ Windows 10 reaches end of support in October 2025, but Firefox will continue to run on it beyond that date.
• ✅ Mozilla has not set an EOS date for Windows 10, meaning Firefox updates will continue for the foreseeable future.
• ✅ Windows 7 is only supported until September 2025 via Firefox ESR 115 security updates, after which support ends.
• ✅ Users are encouraged to plan ahead: upgrade to Windows 11 if possible, or use Microsoft’s Extended Security Updates (ESU) program to stay protected.

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Firefox on Windows 10: What to Expect

While Microsoft will stop releasing free updates for Windows 10 after October 14, 2025, Mozilla has confirmed that Firefox will continue supporting Windows 10 users for years to come.

• Firefox Release Channel: Fully supported on Windows 10, with regular security updates and performance fixes.
• Firefox ESR (Extended Support Release): Both the current ESR 140 and next year’s ESR 152 will include Windows 10 support. ESR versions are a good option for users who prefer stability over frequent feature updates.

Unlike Windows 7 or 8.1, Windows 10 users don’t need to switch to ESR to stay supported.

Windows 7: The End of the Road

The contrast with Windows 7 is striking. Mozilla extended Firefox ESR 115 support on Windows 7, 8.1, and older macOS versions, but only until September 2025. After that, no further security patches will be provided, and users will be left vulnerable.

This shows a clear difference:

• Windows 7/8.1: End of the line with ESR 115 security updates until September 2025.
• Windows 10: Still on the roadmap for ongoing Firefox support, even after Microsoft stops updates.

Preparing for the Future

While Mozilla is giving Windows 10 users extra time, you shouldn’t get complacent. Running an unsupported operating system poses security risks, even if Firefox itself continues updating. Mozilla recommends:

1. Upgrade to Windows 11 if your device is eligible. Firefox runs smoothly on it, with all your tabs, history, and settings preserved.
2. Enable Windows Backup for a free one-year extension of Windows 10 security updates (requires a Microsoft account).
3. Plan for new hardware in case your device cannot run Windows 11. Use a Mozilla account to sync your Firefox data for an easy migration.

Conclusion: Firefox Buys You Time, But Don’t Wait Too Long

The bottom line: Firefox will continue to support Windows 10 users beyond October 2025, giving you more time compared to Windows 7 users, whose support truly ends in 2025.

However, this doesn’t mean you should stick with Windows 10 indefinitely. The lack of Microsoft updates means your system itself will be increasingly exposed to vulnerabilities, even if Firefox remains supported.

Think of Mozilla’s commitment as a grace period — time to prepare your transition to Windows 11 or a new PC without immediately losing access to a secure browser.

Ref.

• https://support.mozilla.org/en-US/kb/firefox-support-windows-10-end-support
• https://whattrainisitnow.com/release/?version=esr
• https://bugzilla.mozilla.org/show_bug.cgi?id=1983020