Browser Security: Web applications like this one cannot take screenshots automatically or in the background. Capturing your screen requires your explicit permission each time via a browser prompt when using real screenshot functionality (not the placeholder used here).

Telegram Button: The "Take New Screenshot" button sent to Telegram only sends a text message back to the chat. It cannot trigger a screenshot remotely. You must return to this web page and click the "Take Screenshot" button.

For automated background screenshots triggered remotely, a dedicated desktop application or browser extension with specific permissions would be necessary. This web app runs within the secure sandbox of your browser.