I used the extension before, but I stopped and came back to it again this week, but it stopped working, the microphone symbol has a dash on it, and the recharge signal appears and goes back to the microphone, and does not recognize any command
Oh, I had this problem too. You have to open the extension Home page, say "wake Up", then go back to the tab you were working on and it will work.
One week ago the same you have described happened to me.
I think it was an error related to my network or the Speech Recognition service that Handsfree for Web uses. A few hours later the error disappears without any change from my part.
Could you check again to review if the issue persists?
A screenshot showing how the mic looks might help me to identify the error.