Mozilla Updates Firefox to Version 147 with Hardware and Tab Improvements

Published on January 15, 2026 | Translated from Spanish
Screenshot of Firefox 147 browser showing the active Picture-in-Picture floating video window over other tabs, with the tabs settings menu open in the background.

Mozilla updates Firefox to version 147 with hardware and tabs improvements

The Mozilla Foundation has released a new stable version of its web browser. Firefox 147 arrives with a set of updates focused on optimizing its performance and making it easier for the user to handle. The changes range from the graphics core to the interface you see every day 🚀.

Renewed graphical power

One of the bases of this version is a deeper work to take advantage of hardware acceleration. Firefox now delegates more graphics processing tasks directly to your system's GPU, which frees up CPU resources and can make browsing, especially on sites with many visual elements, noticeably smoother.

Main areas of improvement:
  • Web page rendering: Complex elements and CSS animations are processed more efficiently.
  • Video playback: Decoding and presentation of multimedia content is improved.
  • Browser interface: The user interface itself is drawn faster and with less consumption.
Multitasking is no longer just a concept, but a window that follows you across the screen while you try to work.

Floating video that activates itself

The star feature in terms of usability is Picture-in-Picture or floating video mode. The novelty is that it can now start automatically. When you switch to another tab while a video is playing, Firefox can automatically minimize it to a small always-visible window. This tool, which debuted in previous versions for Windows and then for Linux and macOS, has become smarter and more practical 👁️.

Configuring tabs is now more logical

Mozilla has also decided to reorganize how tabs are configured. The settings menu has completely remodeled its dedicated section, grouping the options into three clear categories so you can find what you're looking for instantly.

New tabs settings structure:
  • Open: Controls how new links behave, whether they open in tabs or windows.
  • Interact: Manages behavior while browsing, such as previewing tabs or using Ctrl+Tab.
  • Close: Defines what the browser should do when you close a tab or the entire window.

A step towards frictionless browsing

With Firefox 147, Mozilla not only adds features, but also p

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