Bug 1058969 - Made With Code retina images should have explicit width & height

public/views/madewithcode.html

@@ -17,7 +17,8 @@
 
             <div class="mwc-logo-block">
               <a href="http://madewithcode.com/">
-                <img src="#" alt="Made With Code logo" retina-image
+                <img src="#" alt="Made With Code logo"
+                     width="200" height="322" retina-image
                      data-src-1x="/img/made-with-code/logo_mwc.png"
                      data-src-2x="/img/made-with-code/logo_mwc@2x.png"/>
               </a>
@@ -46,7 +47,8 @@
               </figcaption>
               <div class="col-xs-12">
                 <a remix-link="{{ madewithcode.makeid }}">
-                  <img src="#" alt="" retina-image
+                  <img src="#" alt="graphical representation of remix button"
+                       width="245" height="129" retina-image
                        data-src-1x="/img/made-with-code/graphic_remix.png"
                        data-src-2x="/img/made-with-code/graphic_remix@2x.png"/>
                 </a>
@@ -59,7 +61,8 @@
                 <p bind-unsafe-html="madewithcode.step2"></p>
               </figcaption>
               <div class="col-xs-12">
-                <img src="#" alt="" retina-image
+                <img src="#" alt="illustration of thimble window"
+                     width="245" height="176" retina-image
                      data-src-1x="/img/made-with-code/graphic_thimble.png"
                      data-src-2x="/img/made-with-code/graphic_thimble@2x.png"/>
               </div>