Firefox 94 adds many new features, closes over a dozen security holes


In short: Mozilla released Firefox 94, with new features for Windows, MacOS, and Linux operating systems. Some of these are security-focused, alongside the many high-impact vulnerabilities that the update fixed. This comes right after Mozilla rolled out some important new features for the mobile versions of Firefox.

from Mozilla release notes detail updates, which include performance, security and privacy improvements.

Firefox will no longer prompt Windows users for updates, but will download and install updates even when Firefox is closed. On Windows 11, Firefox will now support Snap Layouts menus.

On MacOS, Firefox will now use Apple’s low power mode when viewing full screen videos on certain streaming sites, which Mozilla says should significantly increase battery life on MacBooks. Firefox 94 is also believed to reduce power consumption on Linux by enabling the EGL backend, which should increase WGL performance.

Additionally, Mozilla’s browser will now automatically unload inactive tabs, but users can also seen the memory consumption of each tab via an “about: unloads” page from which they can unload them manually without closing them completely.

Over the next few weeks, Mozilla will be rolling out a security feature called Site Isolation. In order to protect against secondary channel attacks, Site isolation can load each website into its own operating system process. This can prevent malicious sites from accessing information from other sites that a user might have open at the same time.

The blog also notes that Mozilla is rolling a Firefox add-on called Firefox Multi-Account Containers which will separate online profiles into different compartments organized into tabs. This should allow users to sign in to a website or service with multiple separate accounts in the same browser. It could also prevent social media trackers from tracking all of a user’s online activity. Firefox multi-account containers are integrated with Mozilla VPN.

Of the 13 vulnerabilities closed by Firefox 94, Mozilla rates seven as “high impact”. One of these changes prevents sensitive data copied to the clipboard from ending up on Windows 10’s Cloud Clipboard feature, which saves clipboard information to the cloud when enabled.

At the same time, Mozilla this week also released important updates to the interface of mobile versions of Firefox. These have changed the way tabs and bookmarks are displayed, and for Android users, the updated version will group recent searches by subject.


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