🔧 Connect fire buttons only once

src/effects/Fire.js

@@ -117,6 +117,10 @@ var Fire = class {
     dialog.bindColorButton('fire-color-4');
     dialog.bindColorButton('fire-color-5');
 
+    // Connect the buttons only once. The bindPreferences can be called multiple times...
+    if (!this._isConnected) {
+      this._isConnected = true;
+
       // The fire-gradient-reset button needs to be bound explicitly.
       dialog.getBuilder().get_object('reset-fire-colors').connect('clicked', () => {
         dialog.getProfileSettings().reset('fire-color-1');
@@ -129,6 +133,7 @@ var Fire = class {
       // Initialize the fire-preset dropdown.
       this._createFirePresets(dialog);
     }
+  }
 
   // ---------------------------------------------------------------- API for extension.js