files/en-us/mozilla/add-ons/webextensions/api/management/getpermissionwarningsbymanifest/index.md
When the user installs or upgrades an add-on, the browser may warn the user about any particularly powerful permissions that the add-on has requested. Not all permissions result in warnings, and this behavior is not standardized across browsers.
Given the text of a manifest.json file, this function returns the permission warnings that would be given for the resulting add-on, as an array of strings.
This API does not require the "management" API permission.
This is an asynchronous function that returns a Promise.
let gettingWarnings = browser.management.getPermissionWarningsByManifest(
manifestString // string
)
manifestString
string. String containing the manifest file. This must be a valid manifest: for example, it must contain all the mandatory manifest keys.A Promise that will be fulfilled with an array of strings, each of which contains the text of a permission warning.
Log the permission warnings for the given manifest file:
let manifest = {
manifest_version: 2,
name: "test",
version: "1.0",
permissions: ["management", "<all_urls>"],
};
let manifestString = JSON.stringify(manifest);
function gotWarnings(warnings) {
console.log(warnings);
}
function gotError(error) {
console.log(`Error: ${error}`);
}
let gettingWarnings =
browser.management.getPermissionWarningsByManifest(manifestString);
gettingWarnings.then(gotWarnings, gotError);
{{WebExtExamples}}
{{Compat}}
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chrome.managementAPI. This documentation is derived frommanagement.jsonin the Chromium code.