Firefox 105 for developers
This article provides information about the changes in Firefox 105 that affect developers. Firefox 105 was released on September 20, 2022.
Changes for web developers
HTML
No notable changes.
CSS
- Embedded content, such as SVG definitions and content in an
<iframe>
, now respects the theme preferences of the elements in which it is embedded, rather than OS or browser preferences (which may be different). Specifically, embedded content now inherits thecolor-scheme
of the embedding element, andprefers-color-scheme
media queries in the embedded content respect this value rather than the OS/browser level theme setting (Firefox bug 1779457).
JavaScript
- Range restrictions have been relaxed on
formatRange
andselectRange
functions forIntl.DateTimeFormat
,Intl.NumberFormat
, andIntl.PluralRules
objects. This change now allows negative ranges (Firefox bug 1780545).
APIs
DOM
-
The TextDecoderStream and TextEncoderStream interfaces, part of the Encoding API, are now supported (Firefox bug 1486949).
-
The OffscreenCanvas API provides a canvas that can be rendered off-screen in both window and web worker contexts. This allows
<canvas>
elements to be decoupled from the DOM. The OffscreenCanvasRenderingContext2D interface provides support for this and is now enabled by default (Firefox bug 1779009). -
The CSS Font Loading API can now be used in worker threads (Firefox bug 1072107).
WebDriver conformance (WebDriver BiDi, Marionette)
WebDriver BiDi
-
On systems with IPv6 preferred DNS resolution clients will no longer fail to connect when
localhost
is used as host for the WebSocket server (Firefox bug 1769994). -
Improved
RemoteValue
support to allow plain JS objects with simple JSON-serializable fields to be serialized (Firefox bug 1779226).
Marionette
- The
WebDriver:GetElementProperty
command is now able to return node properties as set by web content (Firefox bug 1398792).
Changes for add-on developers
- Support for defining persistent scripts using
scripting
has been added. A script is identified as persistent using thepersistAcrossSessions
property inscripting.RegisteredContentScript
(Firefox bug 1751436). - An extension's resources can no longer be loaded by other extensions by default. To enable other extensions to load resources they must be listed in the extension's
web_accessible_resources
manifest key (Firefox bug 1711168).
Older versions
- Firefox 104 for developers
- Firefox 103 for developers
- Firefox 102 for developers
- Firefox 101 for developers
- Firefox 100 for developers
- Firefox 99 for developers
- Firefox 98 for developers
- Firefox 97 for developers
- Firefox 96 for developers
- Firefox 95 for developers
- Firefox 94 for developers
- Firefox 93 for developers
- Firefox 92 for developers
- Firefox 91 for developers
- Firefox 90 for developers
- Firefox 89 for developers
- Firefox 88 for developers
- Firefox 87 for developers
- Firefox 86 for developers
- Firefox 85 for developers
- Firefox 84 for developers
- Firefox 83 for developers
- Firefox 82 for developers
- Firefox 81 for developers
- Firefox 80 for developers
- Firefox 79 for developers
- Firefox 78 for developers
- Firefox 77 for developers
- Firefox 76 for developers
- Firefox 75 for developers
- Firefox 74 for developers