Bug 591853 - Optimize chrome layer size with lightweight themes with transparent or no footer images. r=enn

browser/themes/gnomestripe/browser/browser.css

@@ -68,7 +68,7 @@
   padding-top: 0;
 }
 
-#browser-bottombox:not([lwthemefooter="true"]) {
+#browser-bottombox {
   /* opaque for layers optimization */
   background-color: -moz-Dialog;
 }

toolkit/content/LightweightThemeConsumer.jsm

@@ -89,6 +89,7 @@ LightweightThemeConsumer.prototype = {
     _setImage(root, active, aData.headerURL);
     if (this._footerId) {
       let footer = this._doc.getElementById(this._footerId);
+      footer.style.backgroundColor = active ? aData.accentcolor || "white" : "";
       _setImage(footer, active, aData.footerURL);
       if (active && aData.footerURL)
         footer.setAttribute("lwthemefooter", "true");