diff --git a/README.md b/README.md
index 1c0d62bcd..bd9a74de1 100644
--- a/README.md
+++ b/README.md
@@ -17,12 +17,14 @@ Or get the latest APK from the [Releases section](https://github.com/adbenitez/d
 
 DeltaLab has some extended support for WebXDC apps:
 
+- `window.webxdc.deltalab` is `true` and can be used by app developers to detect when they can use the DeltaLab-specific features
 - `sendToChat()`: the file object parameter also accepts a `type` field that can be one of:
-  * `sticker`
-  * `image`
-  * `audio`
-  * `video`
-  * `file` (default if `type` field is not present)
+  * `"sticker"`
+  * `"image"`
+  * `"audio"`
+  * `"video"`
+  * `"file"` (default if `type` field is not present)
+- Inside apps, clicking external links is supported, ex. to open in browser, so you can include links to your website or donation pages.
 
 # Credits
 
diff --git a/build.gradle b/build.gradle
index 94e01ac51..d2cca4720 100644
--- a/build.gradle
+++ b/build.gradle
@@ -104,8 +104,8 @@ android {
     useLibrary 'org.apache.http.legacy'
 
     defaultConfig {
-        versionCode 658
-        versionName "1.38.2"
+        versionCode 659
+        versionName "1.38.3"
 
         applicationId "com.b44t.messenger"
         multiDexEnabled true
diff --git a/fastlane/metadata/android/en-US/full_description.txt b/fastlane/metadata/android/en-US/full_description.txt
index 224b4584d..9aa156224 100644
--- a/fastlane/metadata/android/en-US/full_description.txt
+++ b/fastlane/metadata/android/en-US/full_description.txt
@@ -28,4 +28,5 @@ DeltaLab was created with a focus on usability, good user experience, and saving
 <li>Can open/display mardown (*.md) attachments</li>
 <li>Can open/display *.htmlzip attachments</li>
 <li>Can be selected as application when clicking/opening links, this is useful to share the link with web grabber bots</li>
+<li>For mini-apps developers: there are some differences in the WebXDC API, check https://github.com/adbenitez/deltalab-android/#webxdc</li>
 </ul>
diff --git a/res/raw/webxdc.js b/res/raw/webxdc.js
index fbf42d130..3046c87b4 100644
--- a/res/raw/webxdc.js
+++ b/res/raw/webxdc.js
@@ -16,6 +16,8 @@ window.webxdc = (() => {
   };
 
   return {
+    deltalab: true,
+
     selfAddr: InternalJSApi.selfAddr(),
 
     selfName: InternalJSApi.selfName(),
diff --git a/src/org/thoughtcrime/securesms/WebxdcActivity.java b/src/org/thoughtcrime/securesms/WebxdcActivity.java
index 2823851e2..f8f2a3593 100644
--- a/src/org/thoughtcrime/securesms/WebxdcActivity.java
+++ b/src/org/thoughtcrime/securesms/WebxdcActivity.java
@@ -199,12 +199,11 @@ public class WebxdcActivity extends WebViewActivity implements DcEventCenter.DcE
 
   @Override
   protected boolean openOnlineUrl(String url) {
-    if (url.startsWith("mailto:")) {
-      return super.openOnlineUrl(url);
+    if (url.startsWith(baseURL +"/")) {
+      // internal page, continue loading in the WebView
+      return false;
     }
-
-    Toast.makeText(this, "Please embed needed resources.", Toast.LENGTH_LONG).show();
-    return true; // returning `true` causes the WebView to abort loading
+    return super.openOnlineUrl(url);
   }
 
   @Override