Firefox users need to update their browser immediately as a critical security certificate is about to expire.
Mozilla urges Firefox users to update browser immediately
The Mozilla blog revealed that on March 14, 2025, Firefox's root certificate will expire.
An expired certificate can break Firefox add-ons and extensions. An official Mozilla support document explains:
A root certificate is a trusted authority that verifies the authenticity of websites, add-ons, and software updates. When it expires, systems that rely on that certificate can no longer verify these items, which can cause features like add-ons or secure media playback to stop working.
Firefox users must update to Firefox version 128 (or later) or Firefox ESR version 115.13 (or later) to avoid the expired root certificate.
Why is it so important to update Firefox?
Basically, once Mozilla’s root certificate expires (and if you don’t update it), Firefox will become significantly more vulnerable to attack, as it will stop receiving the latest security updates. It will also likely stop receiving DRM-protected content, as the browser’s security is no longer verified.
An outdated Firefox browser can also be vulnerable to malicious add-ons, untrusted certificates, and even compromised passwords.
How to update Mozilla Firefox
If the Firefox update prompt doesn't appear, go to Menu > Help > About Firefox . If an update is available, install it, then restart your browser.
Finally, if you have trouble updating Firefox or your root certificate expires, there's an official Mozilla support forum thread filled with tips and guidance on the process.
If you need help, see our guide on how to update Firefox for detailed instructions.
See also:
Tired of Microsoft Teams "Download Error" Unexpected blocking your workflow? Follow our expert, step-by-step guide with quick fixes and advanced tips to resolve it instantly. No reinstall needed!
Oil heaters make noise, leak oil, and do not heat up. These are all problems that arise when using a heater. So what are the causes of these problems? Read our article below!
Master how to assign participants to breakout rooms in Microsoft Teams with this step-by-step guide. Boost meeting engagement, automate assignments, and troubleshoot like a pro for seamless virtual collaboration.
Struggling with Microsoft Teams "Price Error" after the latest pricing update? Discover step-by-step fixes to resolve it quickly, restore seamless collaboration, and avoid subscription headaches. Updated with the newest solutions.
Struggling with Microsoft Teams Background Error Transparency? Discover proven step-by-step fixes for blurry, glitchy virtual backgrounds. Restore perfect transparency in Teams meetings effortlessly. Updated with the latest solutions.
Struggling with Microsoft Teams "Đăng nhập" login error? Discover step-by-step fixes for smooth sign-in. Clear cache, update app, and more – no tech skills needed! Works on Windows, Mac, and web.
Tired of Microsoft Teams Web Error 503 Service Unavailable blocking your meetings? Discover quick, step-by-step fixes to resolve the 503 error fast – no tech skills needed! Clear cache, check status, and get back to collaborating seamlessly.
Stuck with Microsoft Teams Update Error 0x80070002? Discover proven troubleshooting steps to resolve this frustrating issue quickly and get your Teams app updated seamlessly for uninterrupted collaboration.
Tired of Microsoft Teams Error AADSTS50020 blocking your sign-in? Discover step-by-step fixes for user account conflicts, backed by the latest Azure AD solutions. Get back to work fast!
Tired of Microsoft Teams microphone error with no sound? Discover quick, step-by-step fixes for Teams mic not working on Windows, Mac, and more. Restore crystal-clear audio in minutes!
Tired of the Microsoft Teams "Task Management" Error disrupting your workflow? Discover proven fixes like clearing cache, updating Teams, and troubleshooting permissions to get back to seamless collaboration in minutes. Updated with the latest solutions.
Frustrated by the Microsoft Teams 'How to Teams' Help Error? Discover proven, step-by-step solutions to fix it quickly and restore smooth help access. Latest 2026 updates included for seamless teamwork.
Struggling with Microsoft Teams "Room Error" Syncing? This ultimate guide provides step-by-step fixes for Microsoft Teams Room Error Syncing issues, ensuring seamless meetings and quick resolutions. Updated with the latest tips.
Master troubleshooting Microsoft Teams Workflows Power Automate issues with step-by-step fixes for common errors. Get your automations running smoothly – no more frustration! Proven solutions for triggers, permissions, and more.
Struggling with Microsoft Teams "Restart Error" in 2026? Discover proven, step-by-step fixes to resolve the endless restart loop quickly. Clear cache, reset app, and more for seamless collaboration. Get back online fast!
