Can't connect to internet

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http://askubuntu.com – I am able to connect to my home network, but Firefox and Chrome will not connect to the internet. How can I fix this? I am using a wireless laptop. I have troubleshooted that my network is working, and I am currently using my home network with a Windows laptop I borrowed from work. Both browsers worked previously from home and the public network at the library. I am very new to Linux. (HowTos)