diff --git a/src/ios/CDVThemeableBrowser.m b/src/ios/CDVThemeableBrowser.m
index eae386782..9d32b4da4 100644
--- a/src/ios/CDVThemeableBrowser.m
+++ b/src/ios/CDVThemeableBrowser.m
@@ -78,6 +78,11 @@ - (CDVThemeableBrowser*)initWithWebView:(UIWebView*)theWebView
     return self;
 }
 
+- (id)settingForKey:(NSString*)key
+{
+    return [self.commandDelegate.settings objectForKey:[key lowercaseString]];
+}
+
 - (void)onReset
 {
     [self close:nil];
@@ -216,9 +221,18 @@ - (void)openInThemeableBrowser:(NSURL*)url withOptions:(NSString*)options
     }
 
     if (self.themeableBrowserViewController == nil) {
-        NSString* originalUA = [CDVUserAgentUtil originalUserAgent];
+        NSString* userAgent = [CDVUserAgentUtil originalUserAgent];
+        NSString* overrideUserAgent = [self settingForKey:@"OverrideUserAgent"];
+        if (overrideUserAgent) {
+            userAgent = overrideUserAgent;
+        } else {
+            NSString* appendUserAgent = [self settingForKey:@"AppendUserAgent"];
+            if(appendUserAgent) {
+                userAgent = [userAgent stringByAppendingString: appendUserAgent];
+            }
+        }
         self.themeableBrowserViewController = [[CDVThemeableBrowserViewController alloc]
-                                               initWithUserAgent:originalUA prevUserAgent:[self.commandDelegate userAgent]
+                                               initWithUserAgent:userAgent prevUserAgent:[self.commandDelegate userAgent]
                                                browserOptions: browserOptions
                                                navigationDelete:self
                                                statusBarStyle:[UIApplication sharedApplication].statusBarStyle];