Mr Uptime

Mr Optime is a Firefox add-on that lets you know about changes to websites that are usually problematic or unavailable.

Check the Mr Uptime that you want to check and it will alert you when you are alerted. In this way, you do not have to check it yourself, because Mr. Uptime will tell you again when it comes back.

Ms. accidentally can be really useful because it learns when changes occur and only when they can be used to know exactly. If you are usually surfing the net, Mr. Uptime can be a good friend.