diff --git a/source/background.ts b/source/background.ts
index 76188f5..903ac45 100644
--- a/source/background.ts
+++ b/source/background.ts
@@ -1,10 +1,32 @@
 import {browser} from 'webextension-polyfill-ts';
+import {
+  defaultSettings,
+  getManifest,
+  getSettings,
+  setSettings,
+  versionAsNumber
+} from '.';
 
 // Add listeners to open the options page when:
 // * The extension icon is clicked.
 // * The extension is installed.
 browser.browserAction.onClicked.addListener(openOptionsPage);
-browser.runtime.onInstalled.addListener(openOptionsPage);
+browser.runtime.onInstalled.addListener(async () => {
+  const manifest = getManifest();
+  const settings = await getSettings();
+  const versionGotUpdated =
+    versionAsNumber(manifest.version) >
+    versionAsNumber(settings.data.version ?? defaultSettings.data.version!);
+
+  if (versionGotUpdated) {
+    settings.data.version = manifest.version;
+    await setSettings(settings);
+  }
+
+  if (versionGotUpdated || manifest.nodeEnv === 'development') {
+    await openOptionsPage();
+  }
+});
 
 async function openOptionsPage() {
   await browser.runtime.openOptionsPage();
diff --git a/source/manifest.json b/source/manifest.json
index 54fbec5..b471616 100644
--- a/source/manifest.json
+++ b/source/manifest.json
@@ -3,7 +3,7 @@
   "manifest_version": 2,
   "name": "Tildes ReExtended",
   "description": "An updated and reimagined recreation of Tildes Extended to enhance and improve the experience of Tildes.net.",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "permissions": [
     "downloads",
     "storage",
diff --git a/source/settings/defaults.ts b/source/settings/defaults.ts
index 4685faf..7068108 100644
--- a/source/settings/defaults.ts
+++ b/source/settings/defaults.ts
@@ -56,7 +56,8 @@ export const defaultSettings: Settings = {
       '~tv'
     ],
     latestActiveFeatureTab: 'debug',
-    userLabels: []
+    userLabels: [],
+    version: '0.0.0'
   },
   features: {
     autocomplete: true,
diff --git a/source/settings/index.ts b/source/settings/index.ts
index 2d0ae5f..05fdd12 100644
--- a/source/settings/index.ts
+++ b/source/settings/index.ts
@@ -51,10 +51,12 @@ export async function getSettings(): Promise<Settings> {
     features: {...defaultSettings.features, ...syncSettings.features}
   };
 
-  window.TildesReExtended.debug = settings.features.debug;
-  // If we're in development, force debug output.
-  if (getManifest().nodeEnv === 'development') {
-    window.TildesReExtended.debug = true;
+  if (window?.TildesReExtended !== undefined) {
+    window.TildesReExtended.debug = settings.features.debug;
+    // If we're in development, force debug output.
+    if (getManifest().nodeEnv === 'development') {
+      window.TildesReExtended.debug = true;
+    }
   }
 
   return settings;
diff --git a/source/utilities/index.ts b/source/utilities/index.ts
index 7abd515..61143eb 100644
--- a/source/utilities/index.ts
+++ b/source/utilities/index.ts
@@ -48,3 +48,4 @@ export * from './groups';
 export * from './query-selectors';
 export * from './report-a-bug';
 export * from './validators';
+export * from './version';
diff --git a/source/utilities/version.ts b/source/utilities/version.ts
new file mode 100644
index 0000000..e987900
--- /dev/null
+++ b/source/utilities/version.ts
@@ -0,0 +1,7 @@
+/**
+ * Returns a version string as a number by removing the periods.
+ * @param version
+ */
+export function versionAsNumber(version: string): number {
+  return Number(version.replace(/\./g, ''));
+}