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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