diff --git a/static/js/grab-canvas.js b/static/js/grab-canvas.js
index b3ccc46..002a8fb 100644
--- a/static/js/grab-canvas.js
+++ b/static/js/grab-canvas.js
@@ -27,6 +27,16 @@
         captureFn = sourceElt.mozCaptureStream;
     }
 
+    if(sourceElt instanceof HTMLCanvasElement){
+        captureFn = sourceElt.captureStream.bind(sourceElt)
+    } else {
+        if(sourceElt.mozCaptureStream){
+            captureFn = sourceElt.mozCaptureStream.bind(sourceElt)
+        } else {
+            captureFn = sourceElt.captureStream.bind(sourceElt)
+        }
+    }
+
     const canvasStream = captureFn()
     const canvasStreamTracks = canvasStream.getVideoTracks()
     if(canvasStreamTracks.length > 0){