This article provides information about the changes in Firefox 115 that affect developers. Firefox 115 was released on July 04, 2023.
- The CSS
animation-compositionproperty is now supported by default. You can use this property to specify the composite operation to use when multiple animations affect the same property simultaneously. (Firefox bug 1823862).
supports-conditionsin the CSS
supports()function is now supported by default. This feature allows stylesheets to be imported only if the specified feature is supported in the user's browser. (Firefox bug 1830779).
Array.fromAsync()static method is now supported. The method asynchronously returns a new, shallow-copied
Arrayinstance from an async iterable, iterable, or array-like object (Firefox bug 1795816).
TypedArrays.with()are now supported. These methods return a new array with elements that have been shallow copied (similarly named methods without the
toprefix modify the array elements in place). (Firefox bug 1811057).
No notable changes.
Response.json()static method is now supported, making it easier to construct
Responseobjects for returning JSON data. The method will be useful for service workers and any other code that needs to respond to browser requests with JSON data (Firefox bug 1758943).
URL.canParse()static method can now be used to parse and validate an absolute URL, or a relative URL and base URL. This provides a fast and easy way to check if URLs are valid, instead of constructing them within a
try...catchblock and handling exceptions. (Firefox bug 1823354).
URLSearchParams.delete()methods now support the optional
valueargument. This allows matching a search parameter on both the
value, making it possible to work with query strings that contain multiple search parameters that have the same name. (Firefox bug 1831587).
- The payload now always includes stack traces for responses and events without capping it after the first 50 "throw" usages in a realm (Firefox bug 1791715).
- When using
input.performActions, any ongoing wheel transaction is now reset at the end of the command to not retain state and to not leak into following actions within the same tab (Firefox bug 1821733).
- When using a
input.performActions, an invalid element origin now correctly raises a "no such error" failure (Firefox bug 1832028).
- A race condition for the initial page load has been fixed that could appear when directly interacting with a newly opened tab or window (Firefox bug 1832891).
- Both the commands
WebDriver:GetComputedRolenow correctly wait for the requested accessibility object for an element to exist if it just got inserted into the DOM (Firefox bug 1828816).
- All instances of
window.setTimeout()in our privileged code running in content processes now use a variant timer that is not affected by the throttling of the timers in case the given tab for automation is in the background.
- To support its deprecation from Manifest V3 extensions, manifest key property
sidebar_actionfor Manifest V3 extensions (Firefox bug 1830710). See Manifest v3 migration for information about transitioning from
browser_stylein Manifest V3 extensions.
commands.onChangedevent, which enables web extensions to listen for changes to command shortcuts, has been added (Firefox bug 1801531).
- Support has been added for
storage.session, which provides the ability to store data in memory for the duration of the browser session (Firefox bug 18237131).
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