Firefox 151.0.2

Firefox is a fast, secure, and privacy-focused browser with tracking protection, cross-device sync, and a highly customizable interface.

Razvan Serea News Reporter Neowin · May 25, 2026 23:42 EDT with 0 comments

Firefox

Firefox is a fast, full-featured Web browser. It offers great security, privacy, and protection against viruses, spyware, malware, and it can also easily block pop-up windows. The key features that have made Firefox so popular are the simple and effective UI, browser speed and strong security capabilities.

Firefox has complete features for browsing the Internet. It is very reliable and flexible due to its implemented security features, along with customization options. Firefox includes pop-up blocking, tab-browsing, integrated Google search, simplified privacy controls, a streamlined browser window that shows you more of the page than any other browser and a number of additional features that work with you to help you get the most out of your time online.

Firefox key features

Enhanced Tracking Protection (ETP) – Blocks trackers, cookies, cryptominers, and fingerprinters by default.
Private Browsing Mode – Deletes history, cookies, and temporary files when closed.
Lightweight & Fast Performance – Optimized memory usage with efficient page loading.
Cross-Platform Sync – Sync bookmarks, passwords, history, and open tabs across devices.
Customizable Interface – Toolbars, themes, and extensions can be tailored to user needs.
Strong Privacy Controls – Options to manage cookies, permissions, and site data easily.
Reader Mode – Strips away clutter for distraction-free reading.
Pocket Integration – Save and read articles offline with Pocket built into Firefox.
Picture-in-Picture (PiP) – Watch videos in a floating window while multitasking.
Extensions & Add-ons – Vast library for productivity, security, and personalization.
Built-in PDF Viewer – No need for external software to view PDFs.
Firefox Monitor – Alerts users if their email is part of a known data breach.
Multi-Account Containers – Isolate browsing sessions (e.g., work, personal, shopping).
Performance & Resource Efficiency – Uses fewer system resources than some competitors.
Open Source & Community-Driven – Transparent development with global contributions.

Firefox 151.0.2 fixes:

Fixed an issue on macOS where smart cards and security keys could fail to load certificates automatically. (Bug 2041208)
Fixed an issue where adding another tab to an existing Split View could unexpectedly close it. (Bug 2039795)
Fixed an issue where Split View would close instead of switching tabs when using the "Switch to Tab" option from the address bar. (Bug 2039787)
Fixed a crash on Windows that occurred when using the Sogou input method to type Simplified Chinese. (Bug 2039203)
Fixed an issue where Firefox stopped caching new content once the disk cache was full, causing pages and resources to be re-downloaded from the network on every visit. (Bug 2031577)
Fixed an issue where some websites could render incorrectly or fail to load when they used JavaScript to insert WebKit-specific style rules. (Bug 2040693)
Fixed an issue where clicking and selecting text in some input fields and text areas did not work on pages that styled them with certain CSS rules. (Bug 2039504)
Fixed an issue where the up and down buttons on number input fields could overlap and hide the value when sites sized the field to fit its contents. (Bug 2039315)
Fixed an issue where sorting strings that include numbers could produce an incorrect order on some websites and web applications. (Bug 2027078)
Fixed an issue where dropdown menus would not open for select elements created inside an iframe and then moved into the parent page. (Bug 2041720)