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diff --git a/utilities/compliance.js b/utilities/compliance.js
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+/**
+ * GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript.
+ * *
+ * Copyright (C) 2021 Yuchen Pei
+ *
+ * This file is part of GNU LibreJS.
+ *
+ * GNU LibreJS is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GNU LibreJS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU LibreJS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * A node script that opens the supplied url and outputs librejs
+ * compliance.
+ *
+ * Usage: node ./compliance.js <url>
+ *
+ * It opens the url, saves a screenshot, and outputs text from the
+ * LibreJS display panel about the webpage compliance.
+ */
+
+var fs = require('fs');
+
+(function libreJSCompliance() {
+  const webdriver = require('selenium-webdriver');
+  const firefox = require('selenium-webdriver/firefox');
+  new webdriver.Builder().forBrowser('firefox')
+    .setFirefoxOptions(new firefox.Options()
+      // Uncomment to test using icecat or abrowser
+      //		       .setBinary("/usr/bin/icecat")
+      //           .setBinary("/usr/bin/abrowser")
+      .headless()
+    )
+    .build()
+    .then(driver =>
+      driver.installAddon("./librejs.xpi", /*isTemporary=*/true)
+        .then(driver.get("about:debugging#/runtime/this-firefox"))
+        .then(_ => driver.findElements(webdriver.By.css('.fieldpair dd')))
+        .then(es => es[2].getText())
+        .then(uuid =>
+          driver.get(process.argv[2])
+            // Refreshing the page, otherwise weblabels may not work.
+            .then(_ => driver.get(process.argv[2]))
+            // Wait, even if the webpage appears loaded, without waiting
+            // the script may get stuck.
+            .then(_ => driver.sleep(5000))
+            .then(_ => driver.takeScreenshot())
+            .then(s => fs.writeFile(
+              "/tmp/screen.png", Buffer.from(s, 'base64'), "binary",
+              err => err ? console.log(err) : console.log("Screenshot saved to /tmp/screen.png")))
+            .then(_ => driver.executeScript("window.open('');"))
+            .then(_ => driver.getAllWindowHandles())
+            .then(handles => driver.switchTo().window(handles[1]))
+            .then(_ => driver.get('moz-extension://'
+              + uuid
+              + '/html/display_panel/content/display-panel.html#fromTab=1'))
+            .then(_ => driver.findElement(webdriver.By.css('div#info')))
+            .then(e => e.getText())
+            .then(console.log)
+        )
+        .then(_ => driver.quit())
+    );
+})();