This extension seems to work just fine. I picked this extension because it puts the usage date right in the text box area so you can see the data easily. I know it's not an official Anthropic endorsed usage monitor, but it's great for having a general idea of where you're at on the free version of Claude AI. My only issue is that sometimes when I open Claude AI I can't see my usage stats until I have some input and responses. I'd like to see the data as soon as I open the Claude AI window.