extensionTypes

Some common types used in other WebExtension APIs.

Types

extensionTypes.ImageDetails
Details about the format and quality of an image.
extensionTypes.ImageFormat
The format of an image.
extensionTypes.InjectDetails
Injects details into a page.
extensionTypes.RunAt
The soonest that the JavaScript or CSS will be injected into the tab.
extensionTypes.CSSOrigin
Indicates whether a CSS stylesheet injected by tabs.insertCSS should be treated as an "author" or "user" stylesheet.

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
ImageDetails
Yes
14
45
?
Yes
14
?
?
48
?
?
?
ImageFormat
Yes
This feature is supported but not exposed through the 'extensionTypes' object.
14
This feature is supported but not exposed through the 'extensionTypes' object.
45
?
Yes
This feature is supported but not exposed through the 'extensionTypes' object.
No
This feature is supported but not exposed through the 'extensionTypes' object.
?
?
48
?
?
?
RunAt
20
This feature is supported but not exposed through the 'extensionTypes' object.
79
This feature is supported but not exposed through the 'extensionTypes' object.
45
?
15
This feature is supported but not exposed through the 'extensionTypes' object.
No
This feature is supported but not exposed through the 'extensionTypes' object.
?
?
48
?
?
?
CSSOrigin
No
No
53
?
No
No
?
?
53
?
?
?

Note: This API is based on Chromium's chrome.extensionTypes API. This documentation is derived from extension_types.json in the Chromium code.

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.

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https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/extensionTypes