3 files changed, 19 insertions, 1 deletions
diff --git a/devtools/server/actors/css-properties.js b/devtools/server/actors/css-properties.js
index d24c133d4..b22d8005f 100644
--- a/devtools/server/actors/css-properties.js
+++ b/devtools/server/actors/css-properties.js
@@ -31,8 +31,12 @@ exports.CssPropertiesActor = ActorClassWithSpec(cssPropertiesSpec, {
   getCSSDatabase() {
     const properties = generateCssProperties();
     const pseudoElements = DOMUtils.getCSSPseudoElementNames();
+    const supportedFeature = {
+      // checking for css-color-4 color function support.
+      "css-color-4-color-function": DOMUtils.isValidCSSColor("rgb(1 1 1 / 100%)"),
+    };
 
-    return { properties, pseudoElements };
+    return { properties, pseudoElements, supportedFeature };
   }
 });
 
diff --git a/devtools/server/actors/inspector.js b/devtools/server/actors/inspector.js
index 20a227a40..883809b6c 100644
--- a/devtools/server/actors/inspector.js
+++ b/devtools/server/actors/inspector.js
@@ -626,6 +626,18 @@ var NodeActor = exports.NodeActor = protocol.ActorClassWithSpec(nodeSpec, {
   },
 
   /**
+   * Get the full CSS path for this node.
+   *
+   * @return {String} A CSS selector with a part for the node and each of its ancestors.
+   */
+  getCssPath: function () {
+    if (Cu.isDeadWrapper(this.rawNode)) {
+      return "";
+    }
+    return CssLogic.getCssPath(this.rawNode);
+  },
+
+  /**
    * Scroll the selected node into view.
    */
   scrollIntoView: function () {
diff --git a/devtools/server/actors/root.js b/devtools/server/actors/root.js
index b6f8c0ee4..a5df148c2 100644
--- a/devtools/server/actors/root.js
+++ b/devtools/server/actors/root.js
@@ -145,6 +145,8 @@ RootActor.prototype = {
     addNewRule: true,
     // Whether the dom node actor implements the getUniqueSelector method
     getUniqueSelector: true,
+    // Whether the dom node actor implements the getCssPath method
+    getCssPath: true,
     // Whether the director scripts are supported
     directorScripts: true,
     // Whether the debugger server supports