Problem with Twitch?

It's about a week that the button doesn't appear under twitch vods. It has been removed or twitch changed something and it does not work anymore?

• Browser: Firefox 84.0 Windows
• User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0
• Extension: ff 9.31