Downloading the Sirena app has several benefits:
It provides better performance in a bad connection situation. The app will remain visible in case your Internet has micro cuts.
You will improve loading time.
You will be able to log in faster, with a shortcut on your desktop.
How to download it
1- In the Google Chrome where you have Sirena, go to the address bar.
2- Click on this icon:
3- You will be asked if you want to install the app. Accept, and voila!