Mozilla has officially rolled out Firefox 154, bringing a significant set of usability enhancements and critical security patches to Windows, macOS, Linux, and Android. This major release focuses on integrating cloud gaming directly into the browser, offering users more personalization options, and tightening security with fixes for 58 known vulnerabilities.
For Windows users, the headline feature is the native integration of Nvidia GeForce Now. This allows you to stream games directly through the browser without needing a high-end GPU or expensive hardware, potentially saving you from the upfront costs of a gaming rig. Additionally, Windows users can now customize the Firefox app icon, a feature previously available on mobile. Options include nostalgic designs from 2004 and 2017, a rainbow “Pride” icon, and other bonus variants. macOS and Linux users will see this feature arrive in a future update.
What’s New in Firefox 154?
Beyond the gaming and icon updates, Mozilla has made several performance and functionality improvements across all supported platforms. One of the most noticeable changes is faster video skipping. If you’ve ever found yourself waiting for the player to catch up when scrubbing through a video timeline, this update should make that experience significantly smoother.
Another behind-the-scenes improvement involves the page translation feature. Previously, Firefox relied on language metadata provided by the website itself. Now, Firefox performs its own language detection, which means content embedded in iframes will also be translated. This is a practical fix for users who frequently encounter mixed-language content on modern web pages.
Mozilla has also expanded the scope of its free built-in VPN, which was introduced in Firefox 149. The VPN now offers access to virtual locations in 28 countries, with unlimited data available until the end of August. Currently, this service is accessible to users in the US, Canada, the UK, France, and Germany. Furthermore, the free VPN is rolling out to Firefox for Android, with iOS support expected to follow soon, making privacy tools more accessible across the board.
Security Updates in Firefox 154
Security remains a top priority in this release. Mozilla’s security report for Firefox 154 details the resolution of 58 vulnerabilities, with 54 of these reported by external security researchers. The severity of these issues varies, with 17 classified as high risk, 30 as medium risk, and the remainder as low risk.
The report highlights a series of internally discovered vulnerabilities, summarized under CVE-2026-74987 through CVE-2026-74990. These are primarily high-risk issues stemming from programming errors in memory management. By addressing these, Mozilla is preventing potential exploitation that could lead to crashes or unauthorized access. Users running older versions of Firefox should prioritize this update to mitigate these risks.
Firefox ESR Browser Updates
In addition to the standard release, Mozilla has published updates for the Extended Support Release (ESR) channels. The new versions include Firefox ESR 153.1.0, 140.14.0, and 115.39.0. These updates are specifically designed for legacy operating systems, including Windows 7, 8.1, and macOS 10.12 through 10.14.
The ESR updates address the same security vulnerabilities found in the main release, with over 52 fixes in Firefox 153.1.0, at least 31 in Firefox 140.14, and at least 13 in Firefox 115.39. It is worth noting that Firefox ESR 140 will be phased out and replaced by Firefox ESR 153 in October, so organizations relying on the 140 channel should plan their migration accordingly.
What This Means for You
For everyday users, Firefox 154 offers a more polished and capable browsing experience. The Nvidia GeForce Now integration is a game-changer for casual gamers who want to play without investing in new hardware. The customizable icons provide a nice touch of personalization, while the improved video skipping and translation features address long-standing usability complaints.
From a security standpoint, this update is essential. With 58 vulnerabilities fixed, including several high-risk memory management issues, delaying the update leaves your system exposed. Mozilla’s decision to switch to a fortnightly release cycle starting with Firefox 155 on September 1st aligns it with competitors like Google Chrome and Microsoft Edge, ensuring you’ll receive updates more frequently going forward.
How to Get It
You can update Firefox 154 directly from the browser by navigating to the menu and selecting “About Firefox.” The update should download and install automatically. If you are using an ESR version on a legacy OS, ensure you check for updates through your organization’s update channel or visit the Mozilla FTP server for manual downloads.
Source: PCWorld
Over to you: Are you planning to enable the Nvidia GeForce Now streaming feature in Firefox 154, or do you prefer your current gaming setup?
