permissions.contains()

Check whether the extension has the permissions listed in the given permissions.Permissions object.

The Permissions argument may contain either an origins property, which is an array of host permissions, or a permissions property, which is an array of API permissions, or both.

This is an asynchronous function that returns a Promise. The promise is fulfilled with true only if all the extension currently has all the given permissions. For host permissions, if the extension's permissions pattern-match the permissions listed in origins, then they are considered to match.

Syntax

let getContains = browser.permissions.contains(
  permissions                // Permissions object
)

Parameters

permissions: A permissions.Permissions object.

Return value

A Promise that will be fulfilled with true if the extension already has all the permissions listed in the permissions argument, or false otherwise.

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
`contains`	Yes	79	55	?	Yes	14	?	?	79	?	15	?

Examples

// Extension permissions are:
// "webRequest", "tabs", "*://*.mozilla.org/*"

let testPermissions1 = {
  origins: ["*://mozilla.org/"],
  permissions: ["tabs"]
};

const testResult1 = await browser.permissions.contains(testPermissions1);
console.log(testResult1); // true

let testPermissions2 = {
  origins: ["*://mozilla.org/"],
  permissions: ["tabs", "alarms"]
};

const testResult2 = await browser.permissions.contains(testPermissions2);
console.log(testResult2); // false, "alarms" doesn't match

let testPermissions3 = {
  origins: ["https://developer.mozilla.org/"],
  permissions: ["tabs", "webRequest"]
};

const testResult3 = await browser.permissions.contains(testPermissions3);
console.log(testResult3); // true: "https://developer.mozilla.org/"
                          // matches: "*://*.mozilla.org/*"

let testPermissions4 = {
  origins: ["https://example.org/"]
};

const testResult4 = await browser.permissions.contains(testPermissions4);
console.log(testResult4); // false, "https://example.org/"
                          // does not match

Note: This API is based on Chromium's chrome.permissions API.

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/permissions/contains