📃 November 2017 release notes

Newly available

The following features are newly available:

spellcheck: The spellcheck global HTML attribute sets whether the browser may check an element for spelling errors.

The following features are now available in Firefox:

Abortable fetch: If you construct a fetch request with an AbortSignal, you can cancel the request.
AbortController and AbortSignal: The AbortController and AbortSignal APIs allow you to cancel an ongoing operation, such as a fetch() request.
Async iterators and the for await..of loop: Asynchronous iterator objects, such as those returned by promises or generator functions, are iterable with the for await .. of loop.
Date and time <input> types: The <input type="date"> and <input type="time"> HTML elements show date and time pickers.
messageerror: The messageerror event fires on a target, such as a window or worker, when an incoming message cannot be deserialized. This event can fire for many types of messages, such as cross-document messages or broadcast channel messages.
Storage manager: The navigator.storage API provides information about the availability and persistence of the data that a site stores on the device, by using APIs such as the Cache API or the IndexedDB API.

The following features are now available in Firefox for Android:

Abortable fetch: If you construct a fetch request with an AbortSignal, you can cancel the request.
AbortController and AbortSignal: The AbortController and AbortSignal APIs allow you to cancel an ongoing operation, such as a fetch() request.
Async iterators and the for await..of loop: Asynchronous iterator objects, such as those returned by promises or generator functions, are iterable with the for await .. of loop.
Date and time <input> types: The <input type="date"> and <input type="time"> HTML elements show date and time pickers.
messageerror: The messageerror event fires on a target, such as a window or worker, when an incoming message cannot be deserialized. This event can fire for many types of messages, such as cross-document messages or broadcast channel messages.
Storage manager: The navigator.storage API provides information about the availability and persistence of the data that a site stores on the device, by using APIs such as the Cache API or the IndexedDB API.