feat(agent): add allowed domain restrictions for browser agent (#21775)

docs/reference/configuration.md

@@ -706,6 +706,17 @@ their corresponding top-level category object in your `settings.json` file.
   - **Default:** `undefined`
   - **Requires restart:** Yes
 
+- **`agents.browser.allowedDomains`** (array):
+  - **Description:** A list of allowed domains for the browser agent (e.g.,
+    ["github.com", "*.google.com"]).
+  - **Default:**
+
+    ```json
+    ["github.com", "*.google.com", "localhost"]
+    ```
+
+  - **Requires restart:** Yes
+
 - **`agents.browser.disableUserInput`** (boolean):
   - **Description:** Disable user input on browser window during automation.
   - **Default:** `true`