diff --git a/package.json b/package.json
index 02db42d..eba744f 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "license": "AGPL-3.0-or-later",
   "scripts": {
     "build": "node scripts/build-extension.js",
-    "test": "node scripts/test-hostname.js && node scripts/test-activity-tracker.js && node scripts/test-protocol.js && node scripts/test-i18n.js && node scripts/test-popup-settings.js && node scripts/test-popup-catalog-fallback.js && node scripts/test-background-i18n.js",
+    "test": "node scripts/test-hostname.js && node scripts/test-activity-tracker.js && node scripts/test-protocol.js && node scripts/test-i18n.js && node scripts/test-popup-settings.js && node scripts/test-popup-catalog-fallback.js && node scripts/test-background-i18n.js && node scripts/test-firefox-github-release.js",
     "sign:firefox": "./scripts/sign-firefox-xpi.sh",
     "release:firefox": "./scripts/release-firefox-xpi.sh",
     "release:package": "./scripts/package-release.sh"
diff --git a/scripts/firefox-github-release.js b/scripts/firefox-github-release.js
new file mode 100644
index 0000000..d4fac01
--- /dev/null
+++ b/scripts/firefox-github-release.js
@@ -0,0 +1,40 @@
+const fs = require('fs');
+
+const REPOSITORY = 'mirivlad/verstak-browser-extension';
+
+function releaseTag(version) {
+  return `v${version}`;
+}
+
+function releaseAssetURL(version, assetName) {
+  return `https://github.com/${REPOSITORY}/releases/download/${releaseTag(version)}/${assetName}`;
+}
+
+function updateManifest(addonID, version, assetName) {
+  return {
+    addons: {
+      [addonID]: {
+        updates: [{
+          version,
+          update_link: releaseAssetURL(version, assetName),
+        }],
+      },
+    },
+  };
+}
+
+function writeUpdates(addonID, version, assetName, outputPath) {
+  fs.writeFileSync(outputPath, `${JSON.stringify(updateManifest(addonID, version, assetName), null, 2)}\n`);
+}
+
+if (require.main === module) {
+  const [, , command, addonID, version, assetName, outputPath] = process.argv;
+  if (command !== 'write-updates' || !addonID || !version || !assetName || !outputPath) {
+    console.error('usage: node scripts/firefox-github-release.js write-updates <addon-id> <version> <asset-name> <output-path>');
+    process.exitCode = 2;
+  } else {
+    writeUpdates(addonID, version, assetName, outputPath);
+  }
+}
+
+module.exports = { REPOSITORY, releaseTag, releaseAssetURL, updateManifest, writeUpdates };
diff --git a/scripts/test-firefox-github-release.js b/scripts/test-firefox-github-release.js
new file mode 100644
index 0000000..338a3f9
--- /dev/null
+++ b/scripts/test-firefox-github-release.js
@@ -0,0 +1,24 @@
+#!/usr/bin/env node
+const assert = require('assert');
+const release = require('./firefox-github-release');
+
+const version = '2.0.2';
+const asset = 'verstak-firefox-2.0.2.xpi';
+
+assert.equal(release.releaseTag(version), 'v2.0.2');
+assert.equal(
+  release.releaseAssetURL(version, asset),
+  'https://github.com/mirivlad/verstak-browser-extension/releases/download/v2.0.2/verstak-firefox-2.0.2.xpi',
+);
+assert.deepEqual(release.updateManifest('verstak-bridge@verstak.app', version, asset), {
+  addons: {
+    'verstak-bridge@verstak.app': {
+      updates: [{
+        version: '2.0.2',
+        update_link: 'https://github.com/mirivlad/verstak-browser-extension/releases/download/v2.0.2/verstak-firefox-2.0.2.xpi',
+      }],
+    },
+  },
+});
+
+console.log('Firefox GitHub release metadata tests passed');