"use strict"; const server = createHttpServer(); server.registerDirectory("/data/", do_get_file("data")); const BASE_URL = `http://localhost:${server.identity.primaryPort}/data`; function contentScript() { window.x = 12; browser.test.assertEq(window.x, 12, "x is 12"); browser.test.notifyPass("background test passed"); } let extensionData = { manifest: { content_scripts: [ { matches: ["http://localhost/*/file_sample.html"], js: ["content_script.js"], run_at: "document_idle", }, ], }, files: { "content_script.js": contentScript, }, }; add_task(async function test_contentscript() { let extension = ExtensionTestUtils.loadExtension(extensionData); await extension.startup(); let contentPage = await ExtensionTestUtils.loadContentPage( `${BASE_URL}/file_sample.html` ); await extension.awaitFinish(); await contentPage.close(); await extension.unload(); });