fix(all-rules): fix flakey all-rules firefox test

wilco and I believe marque is to blame because it is animated

test/integration/full/all-rules/all-rules.html

@@ -94,7 +94,7 @@ <h2>Ok</h2>
         <p tabindex="-1">Paragraph.</p>
         <input type="button" />
         <input type="image" src="img.jpg" />
-        <marquee>This content is inside a marquee.</marquee>
+        <marquee scrollamount="0">This content is inside a marquee.</marquee>
         <div role="navigation">
           <div role="banner"></div>
           <div role="complementary"></div>