Notice : The steps() function was previously called frames(), but a few details altered, along with the CSS Working Group decided to rename it to something less confusing.
A Few examples, how to sate your desire:
Like this, we may have included a animation to a DOM node as an example:

The Storage Access API was enabled by default, providing a mechanism for embedded, cross-origin content to request access to client-side storage mechanics it would normally just have access to in a first-party context. This API comes with a few easy methods, hasStorageAccess() and requestStorageAccess(), which check and ask storage access. For example:
The article Firefox 65: WebP support, Flexbox Inspector, fresh tooling & stage updates appeared first on Mozilla Hacks – the internet programmer blog.
Firefox 65 features notable DevTools improvements.
Padding:
    env(safe-area-inset-top, 20px)
    env(safe-area-inset-right, 20px)
    env(safe-area-inset-bottom, 20px)
    env(safe-area-inset-left, 20px);

steps() animation timing function

A good evening for DevTools

In Mozilla, we think that new attributes of the web platform are often best known with the support of intuitive, visual tools. That’s why our DevTools team has spent getting feedback and assigning new tooling to permit web devs and designers to inspect, edit, understand, and tinker with UI attributes. This drive led to the release of the CSS Grid Inspector, Font Editor, and Shape Path Editor.
The Intl.RelativeTimeFormat constructor lets you output strings explaining localized relative times, for easier human-readable time references in web apps.
ol, ul, p

() => console.log('accessibility given') ,
  () => console.log('access denied')
);

Other honorable mentions

  • The globalThis keyword was added, for accessing the global object in whatever circumstance you’re in. This avoids needing to use a mix of window, self, global, or this, depending upon where a script is executing (e.g. a webpage, a employee, or even Node.js).
  • The FetchEvent thing ’s replacesClientId and resultingClientId possessions are now employed — allowing you to monitor the origin and destination of a navigation.
  • You can now specify a referrer coverage on scripts applied to your documents (e.g. via a referrerpolicy attribute on elements)
  • Lastly, to avoid popup spam, Window.open() can now only be called once a user interaction event.

Media: Support for both WebP and AV1, and other developments

You can find quite a few of ReadableStream demos on GitHub.

JavaScript debugging improvements

Fracture -* properties


body
break-inside: avoid;

JavaScript/APIs

We can make the animation jump in 5 steps that are equal, like this:

Other additions