--- a/browser/components/extensions/ext-theme.js
+++ b/browser/components/extensions/ext-theme.js
@@ -90,17 +90,16 @@ class Theme {
 
   /**
    * Helper method for loading colors found in the extension's manifest.
    *
    * @param {Object} colors Dictionary mapping color properties to values.
    */
   loadColors(colors) {
     for (let color of Object.keys(colors)) {
-      Services.console.logStringMessage(`parsing color=${color}`);
       let val = colors[color];
 
       if (!val) {
         continue;
       }
 
       let cssColor = val;
       if (Array.isArray(val)) {