1 files changed, 1 insertions, 1 deletions
diff --git a/browser/components/extensions/ExtensionControlledPopup.sys.mjs b/browser/components/extensions/ExtensionControlledPopup.sys.mjs
index 270dd65827..b07a8214f3 100644
--- a/browser/components/extensions/ExtensionControlledPopup.sys.mjs
+++ b/browser/components/extensions/ExtensionControlledPopup.sys.mjs
@@ -155,7 +155,7 @@ export class ExtensionControlledPopup {
     );
   }
 
-  observe(subject, topic, data) {
+  observe(subject) {
     // Remove the observer here so we don't get multiple open() calls if we get
     // multiple observer events in quick succession.
     this.removeObserver();