It tries to put the download button at the bottom of left sidebar, but if you have many conversations it puts it where you can't see it/click it.
I managed to click the button programmatically, but the result has a lot of data missing (e.g. lists are not exported correctly)

Can't handle the bold or other markdown markers, The text will be clipped. Rubbish. Don't use it.

chat_openai_com/chat is not available. It will redict to chatgpt.com