Mozilla has made the final builds of Firefox 143, an iteration focused on refining the everyday experience with specific changes to permissions, privacy, and the platform. It's not a massive release, but it does bring noticeable improvements, especially for those who switch between devices or use the browser on mobile and desktop, as in previous releases such as Firefox 139.
The stable rollout will be activated starting this afternoon in Spain, although the installers can already be downloaded from the official servers. Along with this version, Mozilla also plans to release the ESR edition 140.3Those who don't want to wait can get binaries for 64-bit, 32-bit, and ARM64 directly.
Permissions and privacy: more control
When a website requests access to the camera, Firefox 143 displays a preview in the permissions dialog itselfThis makes it easier to choose the right device if you have multiple cameras connected and avoids blind testing.
In Private Browsing, you can now decide whether keep or delete downloaded files at the end of the session. This preference is disabled by default and can be set in Settings > General > Files & Apps, allowing flexibility based on your workflow and privacy level.
Fingerprint Protection is reinforced with «Suspected Fingerprinters»: The browser returns constant values ​​in more system attributes to neutralize identification attempts that cannot be blocked directly. In addition, The "Website Advertising Preferences" option is removed from the Privacy and Security section, which was geared toward privacy-preserving ad measurements.
Firefox 143 improvements on Windows
Firefox 143 allows run sites as web applications on Windows, with the option to pin them to the taskbar and open them in a cleaner window, without the full browser interface. Important: This option is not available if you install Firefox from the Microsoft Store.
In accessibility, support is incorporated for the Windows User Interface Automation (UI Automation), which improves compatibility with system tools such as Narrator, Voice Access, or the text cursor, and generally improves interaction with assistive technologies.
What's new in Android
On mobile, file downloads are gaining ground: from the Downloads screen you can View progress in real time and pause, resume, retry, or cancel without beating around the bush. The option to configure is also available DNS over HTTPS directly from the settings interface
The player incorporates compatibility with xHE-AAC, expanding the supported formats for streaming audio. And if you close or restart the browser, tap the persistent notification reopens the relevant page, making it easier to get back to what you were doing.
Audio, address bar and other settings
According to available information, xHE-AAC is supported on Windows 11 (22H2 or later), macOS and Android 9+, improving quality when the content is compatible. This is a boost for those who consume music and videos on platforms that use this codec.
The address bar also receives minor tweaks: in United States, United Kingdom, Germany, France and Italy can display event dates directly as you type, a quick tip that Mozilla could extend to more countries later.
Developer tools and web platform
In the developer tools, you can prevent similar messages are grouped together Unchecking the "Group Similar Messages" option; this way, all entries are displayed in the console without collapsing them.
In web compatibility, Firefox 143 adds support for <color> en <input type="color">, updates the grid sizing algorithm to better conform to the CSS Grid specification, and allows setting the property display en <details>The pseudo-element is also released ::details-content to style the expandable/collapsible contents of those elements.
Firefox 143 download and availability
If you prefer to install now, you can download Firefox 143 from the Mozilla server. Windows and macOS will receive the update via OTA in the coming days, while rolling Linux distributions will be serving it through their repositories. Also available are source code tarballs and binaries for different architectures.
With this release, Mozilla's browser strengthens privacy and polishes details of daily use, while offering New options in Windows and Android and adds useful capabilities for developers. It's not a radical leap, but it is a package of practical improvements that bolster the experience and pave the way for future iterations.
