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diff --git a/dom/canvas/test/test_toDataURL_parameters.html b/dom/canvas/test/test_toDataURL_parameters.html
new file mode 100644
index 0000000000..b288e4d329
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+++ b/dom/canvas/test/test_toDataURL_parameters.html
@@ -0,0 +1,63 @@
+<!DOCTYPE HTML>
+<title>Canvas test: toDataURL parameters (Bug 564388)</title>
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" href="/tests/SimpleTest/test.css">
+<body>
+<p>
+This test covers the JPEG and webp quality parameter. If (when) the HTML5 spec changes the
+allowed parameters for ToDataURL, new tests should go here.
+</p>
+<canvas id="c" width="100" height="100"><p class="fallback">FAIL (fallback content)</p></canvas>
+<script>
+let canvas = document.getElementById('c');
+let ctx = canvas.getContext("2d");
+
+ctx.strokeStyle = '#FF0000';
+ctx.fillStyle = '#00FF00';
+ctx.fillRect(0, 0, 100, 100);
+ctx.beginPath();
+ctx.moveTo(10, 10);
+ctx.lineTo(90, 90);
+ctx.stroke();
+
+let pngData = canvas.toDataURL('image/png');
+let pngQuality = canvas.toDataURL('image/png', 0.1);
+is(pngQuality, pngData, "Quality is not supported for PNG images");
+
+function checkType(imagetype) {
+    let imageTypeString = 'image/' + imagetype;
+    let imageTypeUpperString = 'IMAGE/' + imagetype.toUpperCase();
+    let data = canvas.toDataURL(imageTypeString);
+    if (data.match(new RegExp('^data:image\/' + imagetype + '[;,]'))) {
+        // Test the JPEG/wepb quality parameter
+
+        let fullQuality = canvas.toDataURL(imageTypeString, 1.0);
+        let lowQuality = canvas.toDataURL(imageTypeString, 0.1);
+        isnot(lowQuality, fullQuality, "A low quality (0.1) should differ from high quality (1.0) " + imageTypeString);
+
+        let medQuality = canvas.toDataURL(imageTypeString, 0.5);
+        isnot(medQuality, fullQuality, "A medium quality (0.5) should differ from high (1.0) " + imageTypeString);
+        isnot(medQuality, lowQuality, "A medium quality (0.5) should differ from low (0.5) " + imageTypeString);
+
+        let tooHigh = canvas.toDataURL(imageTypeString, 2.0);
+        is(tooHigh, data, "Quality above 1.0 is treated as unspecified " + imageTypeString);
+
+        let tooLow = canvas.toDataURL(imageTypeString, -1.0);
+        is(tooLow, data, "Quality below 0.0 is treated as unspecified " + imageTypeString);
+
+        let lowQualityExtra = canvas.toDataURL(imageTypeString, 0.1, 'foo', 'bar', null);
+        is(lowQualityExtra, lowQuality, "Quality applies even if extra arguments are present " + imageTypeString);
+
+        let lowQualityUppercase = canvas.toDataURL(imageTypeUpperString, 0.1);
+        is(lowQualityUppercase, lowQuality, "Quality applies to " + imageTypeString + " regardless of case");
+
+        let lowQualityString = canvas.toDataURL(imageTypeString, '0.1');
+        isnot(lowQualityString, lowQuality, "Quality must be a number (should not be a string) " + imageTypeString);
+    } else {
+        ok(false, "should get a data url " + imageTypeString);
+    }
+}
+
+checkType('jpeg');
+checkType('webp');
+</script>