Google Chrome is required for these alerts. If you do not have google chrome you can get it here https://www.google.com/chrome
After you have chrome installed you will want to visit https://chrome.google.com/webstore/detail/ikknnkomiokeodcdkknnhgjmncfiefmn
Click the +Add to Chrome Button
A pop up will appear click Add
A new tab will open up there will be a Connect to Twitter button click that button
Enter your twitter login details and authorize the app to begin receiving notifications instantly