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
CanvasRenderingContext2D의 drawWindow 메서드는 더 이상 사용되지 않습니다. 대신 tabs.captureTab 확장 API를 사용하세요: https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/tabs/captureTab