Firefox 143.0 is out with Microsoft Copilot AI Integration

Firefox 143.0, the new monthly release of the popular free open-source web browser, is available to download.

The new release of Mozilla’s web browser added support installing websites as web apps for Windows user.

For running website, there’s a new “Add tab to taskbar” icon in the right corner of address bar. By clicking on it, will install the website as web app, and pin it into task bar.

The web app uses the website’s favicon as app icon. It runs in a separate header-less browser window without losing access to your installed add-ons. The features so far is only available for Windows, but not for Firefox installed from Microsoft Store.

For AI users, the new Firefox release added Microsoft Copilot support. It so far supports “Quick response” and “Smart (GPT-5)” chat mode in my case, with ability to generate text, image, and code, and analyze image. It’s free without login required, though a pad version is available for choice that needs an account.

Also for Windows, the browser release added support Windows UI Automation, which improves support for accessibility tools such as Windows Voice Access, Text Cursor Indicator and Narrator. Though, it’s a progressive roll-out feature that may be not ready for you.

When downloading a file in the Private mode, Firefox now asks whether to keep or delete it after that session ends. You have the choice to disable this behavior, by navigating to “Files and Applications” in Settings page.

Other changes in Firefox 143.0 include:

Pin a tab by dragging to the start of the tab strip.
Preview camera inside the permission dialog.
Display events and dates in address bar, for users in United States, United Kingdom, Germany, France, and Italy regions.
xHE-AAC audio playback on Windows 11 22H2+, macOS, and Android 9+
Expand Fingerprinting Protection by reporting constant values for several more attributes.
Various security fixes.

As well there are some change for developers, including:

updated grid sizing algorithm
<input type=color> now recognizes the CSS <color> format in addition to the color hex format
Uncheck the Group Similar Messages now prevents successive similar messages from being grouped.
Remove restrictions that prevent setting the display property on <details> elements, added a ::details-content pseudo-element to style the expandable/collapsible contents of those elements.”,