Mozilla has released Firefox 145, a significant update that introduces new features, enhances security, and discontinues support for 32-bit Linux systems. This release underscores Mozilla’s commitment to providing a secure and user-friendly browsing experience.
Enhanced PDF Functionality
Firefox 145 introduces the ability to add, edit, and delete comments directly within PDF documents. This feature allows users to annotate PDFs with notes, questions, or tasks, streamlining document review processes. A dedicated comment sidebar facilitates easy navigation through annotations, which is particularly beneficial for lengthy or heavily marked-up documents. ([firefox.com](https://www.firefox.com/en-US/firefox/145.0/releasenotes/?utm_source=openai))
Advanced Privacy Protections
Building upon its privacy-centric approach, Firefox 145 implements new defenses against browser fingerprinting. These enhancements reduce the likelihood of users being uniquely identified, thereby bolstering privacy during Private Browsing sessions or when Enhanced Tracking Protection is set to Strict. ([firefox.com](https://www.firefox.com/en-US/firefox/145.0/releasenotes/?utm_source=openai))
Improved Tab Management
To enhance user experience, Firefox 145 introduces a tab group preview feature. By hovering over a tab group name, users can view a preview of the tabs contained within without expanding the group. This functionality aids in efficient tab management and quick navigation. ([firefox.com](https://www.firefox.com/en-US/firefox/145.0/releasenotes/?utm_source=openai))
Integrated Password Management
Users can now access and manage their saved passwords directly from the sidebar, eliminating the need to open a new tab or window. This integration simplifies the process of retrieving and managing login credentials. ([firefox.com](https://www.firefox.com/en-US/firefox/145.0/releasenotes/?utm_source=openai))
Enhanced Link Sharing
The Copy Link to Highlight feature allows users to share specific sections of a webpage by copying a link through the context menu with a given selection. This functionality is particularly useful for directing others to precise content within a page. ([firefox.com](https://www.firefox.com/en-US/firefox/145.0/releasenotes/?utm_source=openai))
Visual and Functional Enhancements
Firefox 145 introduces new brand-inspired wallpapers for the New Tab page, available in both light and dark modes. Additionally, a new setting enables links from external applications to open adjacent to the active tab, rather than at the end of the tab strip, enhancing workflow continuity. ([firefox.com](https://www.firefox.com/en-US/firefox/145.0/releasenotes/?utm_source=openai))
Security Updates
This release addresses multiple high-severity vulnerabilities that could allow attackers to execute arbitrary code on users’ systems. Notably, CVE-2025-13027 involves memory safety bugs that, if exploited, could lead to remote code execution. Users are urged to update promptly to mitigate potential risks.
Discontinuation of 32-bit Linux Support
In line with evolving technology standards, Firefox 145 discontinues support for 32-bit Linux systems. Users on these systems are advised to transition to 64-bit versions to continue receiving updates and support. ([firefox.com](https://www.firefox.com/en-US/firefox/145.0/releasenotes/?utm_source=openai))
Developer-Focused Enhancements
For developers, Firefox 145 introduces support for the `text-autospace` CSS property, allowing automatic spacing adjustments between characters from different scripts. Additionally, the `math` generic font family is now supported, facilitating appropriate font usage in mathematical expressions. The release also includes support for the `Atomics.waitAsync()` JavaScript method, enabling asynchronous thread synchronization based on shared memory values. ([developer.mozilla.org](https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/145?utm_source=openai))
Conclusion
Firefox 145 represents a significant step forward in enhancing user experience, privacy, and security. Users are encouraged to update to this latest version to take advantage of the new features and improvements.
