2 open-source tools on osfeed do this, in 2 ways. Each entry says how, and where it falls short. Read the tool's page before you rely on it.
Limit Detects sharing through the Hyprland portal only; screenshots, direct VNC capture and apps that bypass the portal are not detected. Nothing is muted until you choose.
Limit Other workspaces remain visible. Share indicators may lag a few seconds; exotic scaling can leave a reminder-frame hairline in captures.
Get notified when a tool adds, fixes or changes a way to screen share privacy, including tools added to osfeed later.
