diff --git a/js/misc/extensionUtils.js b/js/misc/extensionUtils.js
index 2b7720abc..dc227801f 100644
--- a/js/misc/extensionUtils.js
+++ b/js/misc/extensionUtils.js
@@ -30,6 +30,7 @@ export const ExtensionState = {
 const SERIALIZED_PROPERTIES = [
     'type',
     'state',
+    'enabled',
     'path',
     'error',
     'hasPrefs',
diff --git a/js/ui/extensionSystem.js b/js/ui/extensionSystem.js
index 55b1e1133..10e1d92de 100644
--- a/js/ui/extensionSystem.js
+++ b/js/ui/extensionSystem.js
@@ -429,6 +429,7 @@ export class ExtensionManager extends Signals.EventEmitter {
             path: dir.get_path(),
             error: '',
             hasPrefs: dir.get_child('prefs.js').query_exists(null),
+            enabled: this._enabledExtensions.includes(uuid),
             hasUpdate: false,
             canChange: false,
             sessionModes: meta['session-modes'] ? meta['session-modes'] : ['user'],
@@ -609,6 +610,13 @@ export class ExtensionManager extends Signals.EventEmitter {
     async _onEnabledExtensionsChanged() {
         let newEnabledExtensions = this._getEnabledExtensions();
 
+        for (const extension of this._extensions.values()) {
+            const wasEnabled = extension.enabled;
+            extension.enabled = newEnabledExtensions.includes(extension.uuid);
+            if (wasEnabled !== extension.enabled)
+                this.emit('extension-state-changed', extension);
+        }
+
         // Find and enable all the newly enabled extensions: UUIDs found in the
         // new setting, but not in the old one.
         const extensionsToEnable = newEnabledExtensions