Mozilla has released Firefox 104 for Windows, Apple macOS and Linux. This article summarizes the most important innovations – as always on this blog in much more detail than on other websites.
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Performance improvements
For improved performance and power consumption, Firefox interface performance is now throttled when Firefox is minimized or hidden, in the same way it has been for background tabs for some time.
The Performance Profiler can now also analyze the power consumption of a website. The prerequisite for this is a Mac computer with Apple Silicon processor or a computer with Windows 11 as the operating system.
More security for Firefox users
Also in Firefox 104 were once more several security vulnerabilities closed. For security reasons alone, an update to Firefox 104 is therefore strongly recommended for all users.
Web platform improvements
CSS scroll snapping support has been expanded to include support for scroll-snap-stop and re-snapping expanded.
On the JavaScript side it is worth mentioning the support of Array.prototype.findLast(), Array.prototype.findLastIndex(), TypedArray.prototype.findLast() such as TypedArray.prototype.findLastIndex().
Cookies from the same domain are no longer treated as cookies from the same domain if they differ in the protocol used (http:// vs. https://).
As always, further innovations for web developers can be found in the MDN Web Docs read.
Other new features of Firefox 104
The subtitles feature for picture-in-picture videos has been extended to more and more video and streaming platforms with recent updates. Disney+ and the Washington Post support will follow with Firefox 104.
If Firefox is configured for a file type to always ask before downloading and the user confirms the download of a file via this dialog, the download panel no longer opens automatically.
If a website is called up via http:// instead of https://, Firefox displays a warning under the password fields that the password is being transmitted unencrypted and is therefore not secure. This warning might previously be disabled using the security.insecure_field_warning.contextual.enabled switch in regarding:config. Starting with Firefox 104, this warning can no longer be switched off.
The More Tools > Task Manager menu item now refers to regarding:processes instead of regarding:performance.
The developer console now supports previewing URLSearchParams objects.
