Firefox 95 for Windows and Mac introduces RLBox, a new sandboxing technology

Enlarge / A minimalist view of the Firefox web browser.


Mozilla released the latest version of Firefox, Firefox 95, for Windows and macOS. It is now available to all users on both platforms.

The Firefox team claims that the new version of macOS reduces CPU usage while processing events and that power consumption is reduced when streaming videos from sites like Netflix, “especially in the open. screen”. MacOS users will also benefit from a faster start to the content process and benefit from memory allocator improvements for better overall performance.

On macOS and Windows, Mozilla has “improved page load performance by compiling JavaScript in advance in a speculative manner.” There’s also a way to move the frame-in-frame toggle button to the opposite side of the video on both platforms, along with a handful of fixes.

But these optimizations and tweaks aside, the best improvements in Firefox 95 are about security, as RLBox is now enabled on all platforms. Mozilla has published a detailed blog post explaining what RLBox is and how it works, but the quick summary is that this is a new sandboxing technique that isolates potentially problematic code in WebAssembly and protects users from harm. threat.

Mozilla’s Bobby Holley writes that RLBox goes beyond what is offered by process-based sandboxing and will be applied in several ways in the future:

RLBox is a big win for us on several fronts: it protects our users against accidental faults as well as supply chain attacks, and it reduces the need to hurry when such issues are disclosed upstream. As such, we intend to continue to apply to more components in the future.

Firefox 95 follows the November 2 release of Firefox 94, which, among other things, added new color themes, introduced site isolation (which is now enabled by default for all Firefox 95 users), has made changes to the way updates were delivered and made several operating system specific optimizations like improving WebGL performance on Linux.

List image by Mozilla

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