Close Tab by Double Right Click のレビュー
Close Tab by Double Right Click 作成者: webextensions.org
webextensions.org による応答
開発者の返信
投稿日時: 7年前The context menu remaining open (even after the tab is closed) is a bug for Firefox-on-Windows with apparently no workarounds :-/
For that, I'll file a bug report to Firefox.
For that, I'll file a bug report to Firefox.