2 files changed, 43 insertions, 0 deletions
diff --git a/browser/extensions/webcompat/experiment-apis/appConstants.js b/browser/extensions/webcompat/experiment-apis/appConstants.js
new file mode 100644
index 0000000000..2869f299a4
--- /dev/null
+++ b/browser/extensions/webcompat/experiment-apis/appConstants.js
@@ -0,0 +1,28 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/* global AppConstants, ExtensionAPI, XPCOMUtils */
+
+this.appConstants = class extends ExtensionAPI {
+  getAPI(context) {
+    return {
+      appConstants: {
+        getReleaseBranch: () => {
+          if (AppConstants.NIGHTLY_BUILD) {
+            return "nightly";
+          } else if (AppConstants.MOZ_DEV_EDITION) {
+            return "dev_edition";
+          } else if (AppConstants.EARLY_BETA_OR_EARLIER) {
+            return "early_beta_or_earlier";
+          } else if (AppConstants.RELEASE_OR_BETA) {
+            return "release_or_beta";
+          }
+          return "unknown";
+        },
+      },
+    };
+  }
+};
diff --git a/browser/extensions/webcompat/experiment-apis/appConstants.json b/browser/extensions/webcompat/experiment-apis/appConstants.json
new file mode 100644
index 0000000000..cf04915eca
--- /dev/null
+++ b/browser/extensions/webcompat/experiment-apis/appConstants.json
@@ -0,0 +1,15 @@
+[
+  {
+    "namespace": "appConstants",
+    "description": "experimental API to expose some app constants",
+    "functions": [
+      {
+        "name": "getReleaseBranch",
+        "type": "function",
+        "description": "",
+        "async": true,
+        "parameters": []
+      }
+    ]
+  }
+]