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Set WebDriver context for addons navigation #383

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Merged
leplatrem merged 1 commit into from
Jul 17, 2026
+20 −2
Merged

Set WebDriver context for addons navigation #383

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22 changes: 20 additions & 2 deletions tests/selenium.spec.js
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Original file line number Diff line number Diff line change
@@ -1,10 +1,11 @@
const { Browser, Builder, By } = require("selenium-webdriver");
const { Options } = require("selenium-webdriver/firefox");
const { Context, Options } = require("selenium-webdriver/firefox");
const FirefoxProfile = require("firefox-profile");
const path = require("path");

// create a static extension ID so we can find it's config page easily
const testExtId = "2d7fbdec-9526-402c-badb-2fca5b65dfa8";
const addonId = "remote-settings-devtools@mozilla.com";

const busyWait = 200; // debounce
let driver = null;
Expand All @@ -22,6 +23,9 @@ beforeAll(async () => {
options.setBinary(process.env.NIGHTLY_PATH || "/usr/bin/firefox-nightly");
options.addArguments("--pref 'extensions.experiments.enabled=true'");
options.addArguments("--headless");
// Required to switch WebDriver into the privileged chrome context, which we
// use to resolve the extension's moz-extension:// URL below.
options.addArguments("-remote-allow-system-access");
options.setPreference("xpinstall.signatures.required", false);
options.setPreference("extensions.experiments.enabled", true);
options.setPreference(
Expand All @@ -38,7 +42,21 @@ beforeAll(async () => {

// install the addon
await driver.installAddon(xpiPath);
await driver.get(`moz-extension://${testExtId}/content/index.html`);

// Since Firefox 152 (bug 2033769), WebDriver:Navigate reports errors instead
// of silently ignoring them, and navigating directly to a hardcoded
// moz-extension:// URL is rejected with "Navigation to ... is not allowed in
// this context". The UUID used in the URL isn't guaranteed to match the
// hardcoded one either, so resolve the real extension URL from the privileged
// chrome context before navigating to it (see bug 1959376).
await driver.setContext(Context.CHROME);
const extPageUrl = await driver.executeScript(
"return WebExtensionPolicy.getByID(arguments[0]).getURL(arguments[1]);",
addonId,
"content/index.html",
);
await driver.setContext(Context.CONTENT);
await driver.get(extPageUrl);

// add mutation observer to listen for loading events
// whenever an event flips from loading to unloading, update a hidden element to debounce
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