Firefox Gets Major Redesign With Round Tabs, New Themes, and Compact Mode

Mozilla has released Firefox 157, and with it comes the most significant visual overhaul the browser has seen in years. The update introduces what the company is calling Nova UI—a design language built around rounded tabs, a suite of new themes, and a Compact Mode that lets users reshape the interface to their own preferences. The changes roll out across both desktop and mobile platforms, marking a coordinated push to modernize the browser's appearance and functionality.

The rounded tabs are the most immediately visible change. Where Firefox tabs were previously angular and geometric, they now curve at the edges, a shift that aligns the browser with design trends that have become standard across much of the software world. But the redesign goes deeper than aesthetics. Mozilla has rebuilt the theme system to give users more control over how Firefox looks and feels. The new themes are more flexible and customizable than their predecessors, allowing people to adjust colors, spacing, and visual weight to match their working style.

Compact Mode represents another layer of this redesign philosophy. The feature lets users compress the browser's interface—tightening spacing, reducing padding, and eliminating visual excess—for those who want to maximize screen real estate or simply prefer a denser, more minimal appearance. This acknowledges that different people work differently. Some want breathing room in their interface; others want everything as tight and efficient as possible. Firefox is now trying to serve both.

The timing of this redesign is deliberate. Firefox has been losing ground to Chrome for years, a gap that has only widened as Google's browser has become the default choice for most web users. Mozilla's leadership has been explicit about the goal: make Firefox compelling enough that people consider switching. A browser that looks modern and feels responsive to user preference is part of that pitch. The company is betting that visual modernization, combined with the flexibility these new features offer, can make Firefox feel like a genuine alternative rather than a legacy choice.

The Nova UI rollout is happening simultaneously across desktop and mobile, which suggests Mozilla is treating this as a unified effort to reshape how people experience the browser regardless of device. On mobile, where screen space is even more precious, Compact Mode and the new theme system take on added importance. A browser that adapts to how you want to use it—whether you're on a laptop or a phone—becomes harder to dismiss.

What remains to be seen is whether a redesign, however thorough, can shift the momentum in Firefox's favor. Browser choice is often a matter of habit and ecosystem lock-in. People use Chrome because their work tools integrate with it, because their passwords and bookmarks live there, because everyone else uses it. A better-looking interface and more customization options are real improvements, but they operate in a competitive space where Chrome's advantages run deeper than visual design. Still, Firefox has always had users who value its independence from Google and its commitment to privacy-focused defaults. For that audience, a modernized, flexible browser might be exactly what was needed to feel like a genuine choice rather than a compromise.