MOBILE-4081 core: Only show warning if http

src/core/singletons/window.ts

@@ -55,6 +55,11 @@ export class CoreWindow {
      * @return Promise resolved if confirmed, rejected if rejected.
      */
     static async confirmOpenBrowserIfNeeded(url: string): Promise<void> {
+        if (!CoreUrlUtils.isHttpURL(url)) {
+            // Only ask confirm for http(s), other cases usually launch external apps.
+            return;
+        }
+
         // Check if the user decided not to see the warning.
         const dontShowWarning = await CoreConfig.get(CoreConstants.SETTINGS_DONT_SHOW_EXTERNAL_LINK_WARN, 0);
         if (dontShowWarning) {