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webRequest.RequestFilter

An object describing filters to apply to webRequest events.

Values of this type are objects. They contain the following properties:

urls: array of string. An array of match patterns. The listener will only be called for requests whose targets match any of the given patterns. Only requests made using HTTP or HTTPS will trigger events, other protocols (such as data: and file:) supported by pattern matching do not trigger events. view-source: requests may be matched based on its inner URL.
types Optional: array of webRequest.ResourceType. A list of resource types (for example, stylesheets, images, scripts). The listener will only be called for requests for resources which are one of the given types.
tabId Optional: integer. The listener will only be called for requests from the tab identified by this ID.
windowId Optional: integer. The listener will only be called for requests from the window identified by this ID.
incognito Optional: boolean. If provided, requests that do not match the incognito state (true or false) will be filtered out.

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`RequestFilter`	Yes If a filter contains unrecognized values in its `types` property, `addListener()` throws an exception.	14 If a filter contains unrecognized values in its `types` property, `addListener()` throws an exception.	45 ["From Firefox 78 onwards, if a filter contains unrecognized values in its `types` property, then these values are ignored and `addListener()` proceeds.", "Before Firefox 78, if a filter contains unrecognized values in its `types` property, `addListener()` throws an exception."]	?	Yes If a filter contains unrecognized values in its `types` property, `addListener()` throws an exception.	14	?	?	48 If a filter contains unrecognized values in its `types` property, `addListener()` throws an exception.	?	No	?
`tabId`	Yes	14	53	?	Yes	14	?	?	53	?	No	?
`urls`	Yes	14	45 Before Firefox 56, moz-extension:// URLs were not allowed.	?	Yes	14	?	?	48 Before Firefox 56, moz-extension:// URLs were not allowed.	?	No	?
`view-source`	Yes	14	84	?	Yes	No	?	?	No	?	No	?
`windowId`	Yes	14	53	?	Yes	14	?	?	53	?	No	?

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

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