Mozilla is struggling to keep pace in the browser market with an update that focuses on everyday experience and privacy. In this release, Firefox 145 It raises the bar with useful changes for those who work with tabs, play video on the web, or need to annotate PDF documents without leaving the browser.
Beyond the visible new features, the company is introducing technical improvements aimed at curbing stealth tracking and simplifying the technological transition on older platforms. For users of Spain and EuropeIn a world where data protection is a priority, new defenses against fingerprinting come at a good time.
Key new features in Firefox 145
The update includes changes designed to make daily use smoother and more consistent across tabs, content, and files. Among the highlights are the following: PDF annotations, expanded Matroska video support, and interface settings.
- PDF: ability to add, edit and delete comments, with a sidebar to quickly review and jump between annotations.
- Videographer: Matroska container compatibility (.mkv) and common codecs such as AVC, HEVC, VP8, VP9, AV1, AAC, Opus and Vorbis for smoother playback.
- Tabs: When you hover over a group name, a preview of its tabs appears to remind you what's inside without opening it.
- Links from apps: new option for “Open app links next to the active tab"in Settings > General > Tabs.
- Sharing sections: The “Copy link to highlight” function has been refined to share specific fragments of a page.
- Interface: Horizontal tab design, more rounded and modern buttons and text fields.
- Extensions: Informative message with a link to the add-ons store when none are installed.
Privacy and anti-fingerprinting
Mozilla takes another step in its defense strategy against fingerprinting. According to the company, the changes to Firefox 145 reduces the possibility of unique identification by about 50%. by fingerprinters, closing vectors that do not depend on blocklists.
The browser limits the exposure of system data These protections are used by tracking scripts (for example, the number of processor cores, the presence of a touchscreen, or the dimensions of the taskbar) to make it more difficult to create persistent profiles. These protections are available in the Private Mode and Strict ETP, with plans to activate them by default after the corresponding validation, and they follow a layered approach to avoid breaking legitimate functionalities.
Changes for 32-bit Linux in Firefox 145
With this version, Mozilla stops offering 32-bit builds for LinuxStarting with Firefox 145, there will no longer be official 32-bit x86 binaries, so it is recommended to migrate to 64-bit systems and browsers to maintain updates and support. This move is in response to... declining use of 32 bits and the associated maintenance costs.
Tab interface and management in Firefox 145
The redesign introduces tabs and controls with softer cornersimproving visual consistency. Furthermore, the hover preview for tab group names makes it easier to resume tasks, and the option to open links from other apps alongside the active tab reduces clutter. better integrate workflows between applicationsThe improved "Copy link to highlight" feature simplifies sharing specific quotes from a page.
What's new for developers
On a technical level, the browser adds support for Atomics.waitAsync For shared-memory based synchronization, the new header Integrity Policy which reinforces the integrity of subresources in scripts and the property text-autospace to automatically adjust the spacing between characters from different alphabets. These changes expand the tools for building more secure and readable websites without sacrificing performance.
Alongside this stable edition, Mozilla publishes Firefox 140.5 and 115.30.0 ESRs with minor fixes. Unlike the standard branch, these extended support versions will continue to work on 32-bit Linuxproviding continuity to environments that still depend on that architecture.
The update, which It will be made official at noon in Spain.It leaves a clear picture: more control over privacyTangible improvements in PDFs, tabs, and multimedia, and a turning point for 32-bit Linux. Those upgrading from Spain or any other European country will find a browser more in line with current requirements, already available via FTP and rolling out gradually over the air (OTA).
