Mozilla has rolled out Firefox 156.0.1 as the first maintenance update in the Firefox 156 series, arriving just a week after the major release.

The new version mainly focuses on fixing a few bugs that could affect browsing, including an issue that caused Firefox to become unresponsive on some websites using CSS anchor positioning. It also fixes a bug that prevented elements inside links from showing their CSS ‘:active’ styles while being clicked.

Firefox 156.0.1 also fixes an issue on Windows where the NVDA screen reader failed to announce address bar buttons when the mouse pointer was moved over them. Mozilla has also addressed a system resource leak that occurred as Firefox content processes were started and stopped.

On macOS 27, Firefox could immediately return a window to its maximized state after it was restored by double-clicking the title bar. This release fixes the issue.

The new 156.0.1 update should already be live for you on the stable channel. To check what version you’re running, open the Help menu and select About Firefox. You can also download the latest binaries from Mozilla’s official website for Linux, macOS, and Windows.

firefox-156-0-1-update-settings-page

Firefox 156 arrived on September 15, 2026, with improvements to memory and CPU usage when displaying large JPEG images that are scaled down on a page, better handling when dragging inline images in rich-text editors, and improved playback of high-sample-rate FLAC audio in MP4 files.

Meanwhile, Android users also picked up the 156 update, which brought a built-in VPN and useful media controls in the notifications panel.

Mozilla is expected to release Firefox 157 on September 29. The upcoming version is set to introduce the new Nova design along with HDR video support for 8-bit color formats, improved audio and video synchronization, changes to the Vertical Tabs sidebar, and other updates, like default JPEG XL support.

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Dwayne Cubbins
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I cover fast-moving stories across apps, online platforms, and everyday tech — phones, wearables, consoles, and whatever else people are fighting with this week. Bugs, rollouts, scams, policy enforcement, and the occasional internet-culture rabbit hole are all fair game. My goal is simple — make confusing tech news readable. When I'm not working, I'm working out or chilling with my dog. Got a tip? You can find me on X @dcubbins.