# Mozilla Firefox 157 Is Now Available for Download with Brand-New Design

> **Open Intelligence Dossier** · First detected: 2026-09-29 13:20 UTC · Category: Technology

## Executive Summary
Mozilla has released Firefox 157, featuring a major visual redesign called Nova UI, round tabs, and hardware AV1 decode.

## Intelligence Brief
Recent technology coverage from multiple outlets establishes that Mozilla has officially launched Firefox 157. The new software release brings a brand-new design and visual refresh to users globally. Specific publications reporting on the software rollout include 9to5Linux, Phoronix, TechPowerUp, Neowin, and The Verge. According to these sources, the update became available for download starting in late September 2026, with some outlets noting the launch timing and early availability options. The coverage heavily emphasizes the aesthetic and functional changes included in the new software version.


According to The Verge and TechPowerUp, Firefox 157 introduces the Nova UI, which features round tabs, new themes, and a Compact Mode. Phoronix and other technical outlets additionally highlight under-the-hood performance improvements, specifically pointing to the inclusion of WebRTC hardware AV1 decode support. Neowin framed the release as one of the browser's biggest updates in years, detailing how users could access the software early before the official rollout. Contextually, this release represents a substantial visual and architectural iteration for the long-standing browser. While older versions focused on incremental fixes, the arrival of Firefox 157 marks a notable departure through its Nova UI design language.


Outlets tracking the browser space note that interface changes of this magnitude are relatively rare for the platform, which explains the high volume of technical and general interest coverage surrounding the deployment of round tabs and updated themes. As the software continues to distribute to users worldwide, observers will be tracking how the community responds to the Nova UI and its new layout options. Coverage does not yet specify subsequent version numbers or upcoming patch schedules beyond the initial release details provided by 9to5Linux, Phoronix, TechPowerUp, Neowin, and The Verge. Users seeking to acquire the update can download the new version directly through standard distribution channels as outlined in the initial launch reports.

## Multi-Source Evidence Table
| Source Outlet | Headline | Verification URL |
|---|---|---|
| phoronix.com | Firefox 157 Now Available With Visual Refresh, WebRTC Hardware AV1 Decode | [Source Link](https://news.google.com/rss/articles/CBMiX0FVX3lxTE5fcHJ2MWsxenNmWDlSNFI5ajNHeV9hZFlYRGNmSHB0XzcwLXVHZkxVczNKNlNGR05jZjJzVFZXVUF0TUYtVTFNWW9hMDdzeXpnUUlNdzR2R2RFb1F2ek5j?oc=5) |
| Neowin | Firefox's biggest update in years launches tomorrow. Here's how to get it early | [Source Link](https://news.google.com/rss/articles/CBMiqAFBVV95cUxOOXRTQlNlQ1FFXzIxWlNYYzJqdW5TMW5SZHcyTVgtSlNZOGRjb0NScGxqekFTSHFMX1ZSRm12MnR6TkVSX01YOExhYUJya2dmck9QbWY4ekpOeTlwWnhfejU1aDlleURZajB3WU1tVEFrdkg3Tm1sYnh0c081N0VjZldzU2lMcmJ5ek5nNm9FYWs5RWVQZ1Aza1NQdTJzUUplS1J1dVBEdlE?oc=5) |
| TechPowerUp | Mozilla Releases Firefox 157 with Nova UI | [Source Link](https://news.google.com/rss/articles/CBMiggFBVV95cUxOSmZTS0l1NWRpRmhsWlYzX2hVc25POThnOGc4ek1ubXhTOUZDcEt4aHhwOVlWTk9aSzljbjRnbzZUMG5YYjlBQnd2NE1tZXpXcVo2MndpSUpEckhUX0RNOXZfdVFqTTVVMjlZamVzN1FXcmlZNDVDb1g1akFSSHVrcWF30gGHAUFVX3lxTE9URmpwV1Z4UnRBSFZsY01pdlREOGdJbjBBdDNMVlhKQ3g4aVotRmRXRFV2SVQxQ3A1RVM2VXpMbzE3a0ViYmkzYzZLU0Z1SmtJbU1HRjBGRk5KQkpVVUJkNFFsS1pLNDZUaWczNHhyRFowX0pCd21tZE9McVNIR20wN0pYQ0pLcw?oc=5) |
| theverge.com | Firefox just got a redesign with round tabs, new themes, and Compact Mode | [Source Link](https://news.google.com/rss/articles/CBMihgFBVV95cUxPRGYyaUdWZ2luQW5WZUZ4UkRyemNncUhiUHlNU2g0SjI3TDRENjdyNlczajY5QzVhVTNmalg1WTJMTHRmUTItRWpvaWVZeURZQVVvZ2MzcmZYVjJBZS1IMEtkVDRNZ3BaZUNNU0ltcFhqZFdiNWlvRmVDRUpmamdBaUdlYXo3Zw?oc=5) |
| 9to5Linux | Mozilla Firefox 157 Is Now Available for Download with Brand-New Design | [Source Link](https://news.google.com/rss/articles/CBMimAFBVV95cUxPcnI1X3hNUDZtaDZMV3VvN0RaNVNYZWtibjF0UnhDY2pzT0pBNUlKTGZpRUQwcG8zSVZyYlhBcXZRTGxjbkd2TF9VWFBsMHd1RGNlRjZoUzJid045U3owcUM1TUlNTEpSdnN4OVhYYkRzWV9iSFZyLVFkbWQ0UDh3ODhSaUI3YmxCRWx6c1d1QTZKZEViSWU0bg?oc=5) |

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*Canonical Source: https://pulse.byoviral.com/trend/2026-09-29/mozilla-firefox-157-is-now-available-for-download-with-brand-new-design*