快科技3月13日消息，Mozilla再一次推迟了Firefox 115 ESR版本的终止支持日期，将Windows 7、8及8.1的浏览器安全更新服务延长至2026年8月底。

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火狐Firefox浏览器115 ESR支持Win7/Win8.1至8月

IT之家

2026-03-12 09:00青岛软媒网络科技有限公司

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Firefox 115 ESR 延长对老旧系统的支持至2026年8月，成为旧版Windows和macOS用户获取安全补丁的最后屏障，Mozilla或将根据用户数据再次调整截止日期。

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IT之家消息，Mozilla 昨日（3 月 11 日）宣布，延长其火狐 Firefox 浏览器 115 ESR（延长支持版）对 Windows 7、Windows 8.1 以及 macOS 10.12-10.14 等老旧操作系统的支持，由原定的 2026 年 3 月延长至 2026 年 8 月。

由于 Chrome 和 Edge 等其他主流浏览器早已放弃支持上述旧版系统，Firefox 115 ESR 一直是老用户获取主流浏览器安全补丁的重要途径。

IT之家援引博文介绍，在 Firefox 115 ESR 的生命周期上，Mozilla 实际上已经表现出了极大的耐心。该版本最初发布于 2023 年 7 月，原计划于 2024 年 9 月停止支持。

鉴于当时仍有大量用户坚守旧版 Windows，Mozilla 先是将截止日期推迟至 2025 年 3 月，随后又延期至 2026 年 3 月，而现在再次延期至 2026 年 8 月。

开发团队在官方页面的备注中明确强调：“我们决定将针对旧版 Windows 和 macOS 的 ESR 115 支持延长至 2026 年 8 月。同时，团队计划在 2026 年 7 月重新评估这一决定，随后再向公众宣布最终的停更细节。”这意味着 8 月可能并非绝对的终点，具体走向仍视用户数据而定。

https://baijiahao.baidu.com/s?id=1859416306359797414&wfr=spider&for=pc

Mozilla changes plans, extends Firefox support on Windows 7 and 8 once more

Posted on March 11, 2026 by Martin Brinkmann

No one has seen that development coming. After announcing the end of support for its Firefox web browser for Windows 7, 8 and 8.1 starting in February 2026, Mozilla seems to have had a change of heart.

Now, the organization says that it is extending support once again. The information has been published on its What Train Is It Now website, which lists the latest and upcoming Firefox releases.

There, Mozilla writes:

We have decided to extend support to ESR 115 only on Windows 7-8.1 and macOS 10.12-10.14 up to August 2026. We will re-evaluate this decision in July 2026 and announce any updates on ESR 115’s end-of-life then.

Support for Firefox on Windows 7, 8, 8.1 and the macOS versions 10.12, 10.13, and 10.14, is guaranteed until at least August 2026. At least? Yes, as Mozilla may extend support again. In either way, the organization will make an announcement in July 2026 regarding the web browser’s support on the older operating systems.

Firefox 115.x users on these operating systems should receive browser updates, only security fixes and critical bug fixes, as usually via the integrated updating system.

The extension gives users on these old systems access to one of the major browsers, as the other major browser makers, including Google and Microsoft, have stopped supporting the older operating systems for a long time already.

Security updates are guaranteed for another six months at the very least. Good move by Mozilla.

Tags: firefox

Category: News

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4 thoughts on “Mozilla changes plans, extends Firefox support on Windows 7 and 8 once more”

Tom Hawack says:

March 11, 2026 at 3:02 pm

Great news. I was about to consider alternate browsers that support Windows 7 (R3dfox, LibreWolf) and will postpone that heavy intellectual decision until at least July, likely August of this year as it seems. Good. Will allow brains to concentrate on Metaphysics of the after-life, not specifically related to Firefox 🙂

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Service Pack says:

March 11, 2026 at 4:30 pm

Firefox ESR 140.15 and Firefox 115.40

Make it happen Mozilla.

Anyway, I am already using Redfox (based on Firefox) and Supermium (based on Chromium) on a Windows 7 installation.

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Microfix says:

March 11, 2026 at 6:39 pm

…and NO esr channel versions forecast for October 2026 and beyond..

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TelV says:

March 25, 2026 at 9:16 am

I get the impression that Mozilla will be supporting v115.x for quite some time to come. I’m basing my opinion on the “What’s New” page where developer options have been added which weren’t present before this latest release. It seems pointless just to add those options for a few months and then drop them.

Also, there’s a significant number of security updates this time around which makes it look like hackers went to town on 115.x assuming that there wouldn’t be anymore updates. So that might have caused some concern over at Mozilla even though they wouldn’t be responsible for this version if users’ systems were compromised.

Still, it’s welcome news in any event.

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https://chipp.in/news/mozilla-changes-plans-extends-firefox-support-on-windows-7-and-8-once-more/#comment-3506

Firefox extends Windows 7 support till August 2026, cancels previous EOS plan

Mozilla canceled the earlier announced end of support of Windows 7 in Firefox 115 ESR. The operating system, along with macOS 10.12-10.14, will receive updates till August 2026. Interestingly, Mozilla doesn't guarantee that this specific version will work seamlessly on other OSes, including Windows 10.

According to Mozilla's internal statistics, by March 2, 2026, 5.33% of Firefox users will still be running Windows 7. A decision on the future of the ESR branch will be made in June.

Earlier, Mozilla set February 24 as the end of support date for Firefox on Windows 7/8.1/10. The Firefox 115 ESR support cycle initially reached its EOS in September 2024. Mozilla subsequently extended this period on three separate occasions, initially until March 2025, followed by an extension to September 2025, and concluding with a final extension to March 2026. This branch received maintenance for nearly three years, which surpassed the typical one year support duration.

At the same time, Mozilla has updated the actual stable browser version to Firefox 148.0.2.

Firefox 148.0.2 Update

Mozilla has launched Firefox 148.0.2, a maintenance update that addresses five security vulnerabilities. Four of these issues raise from memory management errors, which include buffer overflows and use-after-free vulnerabilities. A specific buffer overflow affects the audio and video playback components within the Android version of the browser. These vulnerabilities pose a risk as they allow attackers to execute malicious code via specially crafted web pages. Additionally, the update fixes a CSS parsing error that enables attackers to bypass Same-origin policy restrictions.

Functional Fixes and User Experience Improvements

This release also corrects several non-security regressions to simplify the browsing experience.
Mozilla resolved an issue where search queries on the New Tab page incorrectly redirected users to the address bar.
The update restores full functionality to web-based text editors, which previously failed to apply formatting like bold or italic styles.
The development team also addressed a specific bug involving YouTube. Previously, the site bypassed autoplay blocks if a user held the Ctrl key, a common occurrence on systems utilizing screen readers. Furthermore, the update fixes an alignment error where absolutely positioned elements shifted to the left instead of remaining centered during page loads.
For pages lacking a "title" tag, the browser no longer displays empty tab-switching recommendations.
Finally, the update restores video quality for Windows users with NVIDIA GPUs who utilize the Video Super Resolution feature.AI-Driven Security Collaboration with Anthropic

Firefox version 148 fixed 60 vulnerabilities, a significant increase from the typical 10 to 20 fixes. This was made possible by a joint security initiative between Mozilla and Anthropic. The project used the Claude Opus 4.6 artificial intelligence model to analyze Firefox's codebase for potential vulnerabilities.

This AI-driven analysis identified 22 confirmed vulnerabilities, including 14 issues with a high-severity rating. The process also uncovered 90 non-security bugs within the code. To demonstrate the technical capabilities of the model, Claude Opus 4.6 generated a functional exploit for the vulnerability identified as CVE-2026-2796.

https://winaero.com/firefox-extends-windows-7-support-till-august-2026-cancels-previous-eos-plan/

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