Use of drawWindow method from CanvasRenderingContext2D is deprecated. Use tabs.captureTab extensions API instead https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/tabs/captureTab
Mae'r defnyddir o'r dull drawWindow o CanvasRenderingContext2D yn anghymeradwy. Defnyddiwch estyniadau API tabs.captureTab yn ei le https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/tabs/captureTab