Mozilla Firefox 91 brings support for Windows single sign-on

Firefox 91 should feel faster, and it speeds up the process for signing into Microsoft accounts online.

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What you need to know

Mozilla released Firefox version 91 this week. The latest version of the browser has over 1,200 bug fixes and a handful of new features compared to its predecessor. Among its new features is support for Windows single sign-on (SSO). This feature lets you log in to Microsoft work and school accounts with credentials from your PC.

The update also adds a “more comprehensive logic for clearing cookies,” according to Mozilla. This prevents hidden data leaks.

Here’s what’s new, as outlined byMozilla:

Firefox 91 performs catch-up paints for “almost all user interactions,” according to Mozilla. The company explains that this results in a 10-20% improvement in response time for most interactions.

The latest version of Firefox includes support for Windows single-sign on. It also has over 1,200 bug fixes.

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Sean Endicott is a tech journalist at Windows Central, specializing in Windows, Microsoft software, AI, and PCs. He’s covered major launches, from Windows 10 and 11 to the rise of AI tools like ChatGPT. Sean’s journey began with the Lumia 740, leading to strong ties with app developers. Outside writing, he coaches American football, utilizing Microsoft services to manage his team. He studied broadcast journalism at Nottingham Trent University and is active on X @SeanEndicott_ and Threads @sean_endicott_.