first commit

GitHub Desktop-dev/extensions/idikgljglpfilbhaboonnpnnincjhjkd/tracer/png_tab_path.js

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+html2canvas(document.body).then(function(canvas) {
+  canvas.toBlob(function(blob) {
+    var a = document.createElement('a');
+    var url = URL.createObjectURL(blob);
+    a.href = url;
+    a.download = 'png.png';
+    a.click();
+    window.URL.revokeObjectURL(url);
+  })
+});