Everything You Need to Know About Firefox 151: New Home Tab, PDF Merging, and More
Firefox 151, arriving on May 19, 2026, brings a handful of refinements to Mozilla’s open-source browser. The most noticeable change is the rebranded new tab page—now called Firefox Home—which sports a softer, pill-shaped search bar and a repositioned follow button. Beyond the visual updates, this release introduces a native PDF merging tool, making it easier to combine documents directly in the browser. In this Q&A, we break down the key changes, from the home tab’s new look to productivity boosts, so you know exactly what to expect after updating.
What Is the Biggest Change to the New Tab Page in Firefox 151?
Firefox 151 renames the new tab page to Firefox Home and gives it a refreshed design. The search bar now has a rounded, pill-like shape, drawing inspiration from the upcoming Nova redesign—though it’s no longer sticky when you scroll. The “Stories” section remains in place, but the “follow” topic button has moved to a plus-sign icon located just to the left of the section header. While Mozilla touts a “new look and feel,” the changes are subtle rather than dramatic, preserving the familiar layout while introducing softer visual elements.
How Does the New PDF Merging Feature Work in Firefox 151?
Firefox 151 now includes a built-in PDF merging tool, allowing you to combine multiple PDF files directly within the browser. To use it, open any PDF in Firefox, then select the new “Merge PDFs” option from the toolbar or context menu. You can add additional PDF files, reorder pages via drag-and-drop, and merge them into a single document. The merged PDF can be saved to your device or printed. This feature eliminates the need for third-party tools, making document management faster and more private—everything stays local on your machine.
What Other Improvements Does Firefox 151 Include?
Beyond the home tab update and PDF merging, Firefox 151 packs several under-the-hood enhancements. Performance optimizations improve page load times, especially for heavy sites, while security patches address vulnerabilities discovered since the last release. The browser’s password manager now warns you about reused passwords across multiple logins, helping you strengthen your online security. Additionally, Picture-in-Picture mode receives a subtle UI refresh, making controls more accessible when resizing the floating video window. These changes collectively improve everyday browsing.
When Is Firefox 151 Rolling Out and How Do I Get It?
Firefox 151 begins its rollout on May 19, 2026. As with previous versions, the update will be delivered gradually over the next few days to all users on the stable channel. To manually check for the update, open the menu (three horizontal lines) at the top-right corner, go to Help > About Firefox. The browser will then check for and download the latest version. After a restart, you’ll see the new Firefox Home tab and the PDF merging option. If you’d like to try it sooner, you can download the installer from Mozilla’s website directly.
How Does the New Search Bar Differ from the Previous Version?
The search bar in Firefox 151 now features a rounded, pill-shaped design, a preview of the broader Nova visual overhaul expected in future releases. Unlike the previous sticky search bar that remained at the top when scrolling, the new version scrolls away with the page, mimicking the behavior of many mobile browsers. This change reduces visual clutter on longer pages but may take some getting used to for users who relied on constant access to the search field. The overall search functionality remains unchanged—you can still adjust search engines in settings.
What Happened to the “Follow” Topic Button on the New Tab Page?
In Firefox 151, the “follow” topic button—which lets you subscribe to topics for personalized stories—has been redesigned. It’s no longer a text button but now appears as a plus-sign icon positioned to the left of the section header on the Stories row. This change saves horizontal space and aligns with modern UI patterns, keeping the interface cleaner. Functionality remains the same: clicking the plus icon lets you add new topics or manage existing ones. The visual tweak is part of Mozilla’s gradual shift toward more compact, icon-driven navigation.
Is the “Stories” Section on the New Tab Page Affected?
No, the “Stories” section itself remains exactly as before in Firefox 151. It continues to display personalized article recommendations based on your browsing habits and followed topics. The only change is cosmetic: the follow button is now an icon, and the overall tab design has gentle rounding. If you were hoping for new content sources or layout options, this update does not introduce them. Mozilla seems to be saving more dramatic stories enhancements for a future release, possibly as part of the full Nova redesign.