For better security, go back to your settings and toggle off the Install unknown apps permission for your browser until you need it again.
Once finished, tap Open in the browser notification or find the file in your Downloads folder using a file manager app. Install: Tap the APK file and select Install . Download APK File v2.3.4.2
on the download page before clicking the link. 2. Enable "Unknown Sources" For better security, go back to your settings