--- a/toolkit/modules/LightweightThemeConsumer.jsm
+++ b/toolkit/modules/LightweightThemeConsumer.jsm
@@ -128,17 +128,17 @@ LightweightThemeConsumer.prototype = {
     let root = this._doc.documentElement;
 
     if (aData.headerURL) {
       root.setAttribute("lwtheme-image", "true");
     } else {
       root.removeAttribute("lwtheme-image");
     }
 
-    let active = !!aData.accentcolor;
+    let active = aData.accentcolor || aData.headerURL;
     this._active = active;
 
     if (aData.icons) {
       let activeIcons = active ? Object.keys(aData.icons).join(" ") : "";
       root.setAttribute("lwthemeicons", activeIcons);
       for (let [name, value] of Object.entries(aData.icons)) {
         _setImage(root, active, name, value);
       }