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Test Info:
- Manifest: docshell/test/browser/browser.toml
/* Any copyright is dedicated to the Public Domain.
"use strict";
add_task(async function test_extension_cannot_block_initial_load() {
let extension = ExtensionTestUtils.loadExtension({
manifest: {
manifest_version: 2,
name: "insert script to about:blank",
version: "1.0",
content_scripts: [
{
matches: ["<all_urls>"],
js: ["content.js"],
run_at: "document_start",
all_frames: true,
match_about_blank: true,
},
],
},
files: {
"content.js": function () {
if (window.location.href != "about:blank#unique-hash") {
return;
}
const script = document.createElement("script");
script.src =
"data:,(window.parent.postMessage(`script ${window.location.href}`))()";
(document.documentElement || document).appendChild(script);
},
},
});
await extension.startup();
const tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, url);
await ContentTask.spawn(tab.linkedBrowser, [url], async function (url) {
Assert.equal(content.location.href, url, "Correct content document");
const scriptEvaluated = new Promise(
res =>
(content.onmessage = ({ data }) => {
if (data == "script about:blank#unique-hash") {
res();
}
})
);
let loaded = false;
const iframe = content.document.createElement("iframe");
iframe.onload = () => (loaded = true);
// Let's set a unique hash in case there are other about:blank
iframe.src = "about:blank#unique-hash";
content.document.body.append(iframe);
Assert.ok(loaded, "Load occurred synchronously");
const extScript = iframe.contentDocument.querySelector("script");
Assert.ok(!!extScript, "Extension inserted script synchronously");
await scriptEvaluated;
});
BrowserTestUtils.removeTab(tab);
await extension.unload();
});