Assuming that it opens folders etc on the computer as fast as ever then it's just about your net connection. That could just be slow because so many others in your area and with the same ISP are using it at once. That mostly happens in the evening though when everyone is home.
What ISP do you use? They might have a status page on their website which says if they are having any problems.
You can test your internet speed by downloading a large file from a big place like Microsoft.com or ubantu.com and looking at the download speed. Sometimes one or other of these gets busy, but not both.
Are you using wireless to connect your laptop to the net? This can vary a lot depending on how far from the router/modem/hub you are sitting and what interference there is from nearby electrical items.
You can try plugging it in directly to rule that out
Flower, 'mozilla firefox' or just 'firefox' is the browser. So if anyone asks what browser you use you can say "we don't use internet explorer we use Firefox"
The ISP (internet service provider) is the company you pay for your broadband. It might be BT, Virgin, Tiscali etc.
You will have some kind of box connected to the phone socket (could be called a router, a modem, a hub or cable box)
Big desktop PCs connect to that with a cable, but with a laptop you probably don't have a cable coming from it at all. Your laptop connects to that box by wireless which can play up if you are in a distant room in the house or there is interference from the washing machine or someone mowing their lawn etc.