I preffer "CopyChatGPT - Sidebar Hider" extension, it has more direct usability and it does not need to occupy one icon in the browser toolbar for this task. On the other hand, if for some reason the user is using another extension that modifies the ChatGPT UI and it breaks the button added by "CopyChatGPT - Sidebar Hider" extension, then this "ChatGPT Sidebar Toggle" extension will be an acceptable alternative.