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Firefox 153 Released with HDR Video, Smarter PDF Tools, Better Privacy, and New Linux Improvements

1 month 1 week ago
by George Whittaker

Mozilla has officially released Firefox 153, bringing another round of improvements to its open-source web browser. The latest version introduces new multimedia capabilities, enhanced PDF editing tools, stronger privacy protections, better support for modern web technologies, and several features aimed at improving the browsing experience across Linux, Windows, and macOS. Firefox 153 became available on the stable release channel on July 21, 2026.

While this isn't a major redesign, Firefox 153 delivers a collection of practical updates that benefit both everyday users and web developers.

HDR Video Playback Comes to Windows

One of the headline features in Firefox 153 is support for High Dynamic Range (HDR) video playback on compatible Windows systems.

Users with HDR-capable displays and Windows HDR enabled can now enjoy richer colors, improved contrast, and brighter highlights when watching supported online video content. Mozilla notes that certain laptop displays offering only "HDR video streaming" are not currently supported, and some HDR videos recorded on mobile phones may still have limitations.

Although this feature is Windows-specific, it represents another step toward bringing Firefox in line with modern multimedia standards.

PDF Editing Becomes Even More Powerful

Mozilla continues expanding Firefox's built-in PDF editor, eliminating the need for third-party applications in many situations.

Firefox 153 introduces the ability to:

  • Merge multiple PDF documents
  • Insert images as new PDF pages
  • Continue using existing editing tools such as annotations, page organization, and text editing

These additions make Firefox an even more capable document viewer and editor, especially for users who frequently work with PDF files.

Stronger Privacy and Permission Controls

Privacy remains one of Firefox's biggest selling points, and version 153 introduces several enhancements designed to give users more visibility and control over website permissions.

New improvements include:

  • A visual indicator when a website is actively accessing your location
  • More restrictive default permissions for browser extensions accessing local files
  • Local Area Network (LAN) restrictions enabled by default for all users

These changes reduce unnecessary exposure of local resources while making it easier to understand what websites and extensions can access.

Experimental JPEG XL Support

Firefox 153 also adds experimental support for the JPEG XL image format, which many developers consider a promising successor to older image standards.

JPEG XL offers several advantages, including:

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George Whittaker

Judge Pauses Paramount-Warner Bros Merger

1 month 1 week ago
A federal judge has temporarily paused the Paramount-Warner Bros. merger after a 12-state coalition led by California argued the deal would violate antitrust law. The 14-day restraining order (PDF) preserves the status quo while the court considers a preliminary injunction, which could effectively determine whether the merger survives. Variety reports: "Plaintiff States' showing at least demonstrates that serious questions going to the merits remain, weighing in favor of preliminary injunctive relief," the judge wrote, adding that Paramount has acknowledged it will not be harmed by the delay until the end of September. "Paramount and Warner Bros. will continue to operate as separate, viable companies competing in the marketplace while they wait for the Court to adjudicate this case. The balance of equities, combined with the public's vital interest in antitrust enforcement, therefore tips sharply in favor of the requested injunctive relief." The 12-state coalition, led by California, brought a motion for the temporary restraining order. The states are also seeking a preliminary injunction, which would block the merger until the judge rules on the merits of the states' lawsuit. The 14-day restraining order could be extended to as long as 28 days. Martinez-Olguin, of the U.S. District Court for Northern District of California in Oakland, also set a hearing on the preliminary injunction for Aug. 3, though that date, too, could be delayed if the parties agree. Rob Bonta, the attorney general of California, hailed the judge's ruling as a "critical first win in our case to ensure this megamerger never sees the light of day." "History tells the tale of what happens when a few people have great power over markets that are central to Americans' lives: fewer opportunities for more people, worse products and services for all people," Bonta said. "With our lawsuit, we're fighting for a free and fair market and a thriving film and television industry that serves creatives and audiences alike. We have a full tank of gas, the law on our side, and look forward to continuing to make our case."

Read more of this story at Slashdot.

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