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"use strict"; this.EXPORTED_SYMBOLS = ["webrequest_test"]; Components.utils.importGlobalProperties(["fetch", "XMLHttpRequest"]); this.webrequest_test = { testFetch(url) { return fetch(url); }, testXHR(url) { return new Promise(resolve => { let xhr = new XMLHttpRequest(); xhr.open("HEAD", url); xhr.onload = () => { resolve(); }; xhr.send(); }); }, };