diff --git a/scripts/check-impl-url-status.js b/scripts/check-impl-url-status.js
new file mode 100644
index 00000000000000..359aef92b8a81c
--- /dev/null
+++ b/scripts/check-impl-url-status.js
@@ -0,0 +1,134 @@
+/* This file is a part of @mdn/browser-compat-data
+ * See LICENSE file for more information. */
+
+import esMain from 'es-main';
+import yargs from 'yargs';
+import { hideBin } from 'yargs/helpers';
+
+import { lowLevelWalk } from '../utils/walk.js';
+import packageJson from '../package.json' with { type: 'json' };
+
+const VERSION = packageJson.version;
+const USER_AGENT = `MDN-BCD-Implementation-Status-Checker/${VERSION} (+https://github.com/mdn/browser-compat-data)`;
+
+/**
+ * Checks the status of all `impl_url` values.
+ * @param {object} options
+ * @param {boolean} [options.firefox]
+ * @param {boolean} [options.safari]
+ */
+const checkImplUrlStatus = async ({
+  firefox: checkFirefox = false,
+  safari: checkSafari = false,
+}) => {
+  /** @type {Map<string, { path: string; browser: string }[]>} */
+  const byImplUrl = new Map();
+
+  for (const support of lowLevelWalk()) {
+    const { compat, path } = support;
+    if (!compat) {
+      continue;
+    }
+
+    if (!compat.support) {
+      continue;
+    }
+
+    for (const [browser, value] of Object.entries(compat.support)) {
+      const stmts = Array.isArray(value) ? value : [value];
+      for (const stmt of stmts) {
+        if (stmt.version_added !== false || !stmt.impl_url) {
+          // Only check bugs for unimplemented features.
+          continue;
+        }
+
+        const impl_urls = Array.isArray(stmt.impl_url)
+          ? stmt.impl_url
+          : [stmt.impl_url];
+
+        for (const impl_url of impl_urls) {
+          const items = byImplUrl.get(impl_url) ?? [];
+          items.push({
+            path,
+            browser,
+          });
+          byImplUrl.set(impl_url, items);
+        }
+      }
+    }
+  }
+
+  const browsers = [
+    {
+      enabled: checkFirefox,
+      shortUrlPrefix: 'https://bugzil.la/',
+      apiUrl: 'https://bugzilla.mozilla.org/rest/bug',
+    },
+    {
+      enabled: checkSafari,
+      shortUrlPrefix: 'https://webkit.org/b/',
+      apiUrl: 'https://bugs.webkit.org/rest/bug',
+    },
+  ];
+
+  for (const { enabled, shortUrlPrefix, apiUrl } of browsers) {
+    if (!enabled) {
+      continue;
+    }
+
+    const ids = [...byImplUrl.keys()]
+      .filter((url) => url.startsWith(shortUrlPrefix))
+      .map((url) => url.split('/').at(-1))
+      .sort();
+
+    const url = new URL(apiUrl);
+    url.searchParams.set('id', ids.join(','));
+    url.searchParams.set(
+      'include_fields',
+      ['id', 'summary', 'status', 'resolution'].join(','),
+    );
+
+    const response = await fetch(url.toString(), {
+      headers: { 'User-Agent': USER_AGENT },
+    });
+    const result = await response.json();
+    for (const bug of result.bugs) {
+      if (bug.status !== 'RESOLVED') {
+        continue;
+      }
+
+      const impl_url = `${shortUrlPrefix}${bug.id}`;
+      console.log(`[${bug.resolution}] ${impl_url} - ${bug.summary}`);
+      for (const item of byImplUrl.get(impl_url) ?? []) {
+        console.log(`${item.path} -> ${item.browser}`);
+      }
+      console.log();
+    }
+  }
+};
+
+if (esMain(import.meta)) {
+  const { firefox, safari } = yargs(hideBin(process.argv))
+    .command('$0', 'Check the status of all impl_url values for resolved bugs')
+    .option('firefox', {
+      describe: 'Check Firefox (Bugzilla) impl_url statuses',
+      type: 'boolean',
+      default: false,
+    })
+    .option('safari', {
+      describe: 'Check Safari (WebKit) impl_url statuses',
+      type: 'boolean',
+      default: false,
+    })
+    .check((argv) => {
+      if (!argv.firefox && !argv.safari) {
+        throw new Error(
+          'At least one of --firefox or --safari must be specified',
+        );
+      }
+      return true;
+    })
+    .parseSync();
+
+  await checkImplUrlStatus({ firefox, safari });
+}