This is a helpful extension. You might know Tor which helps you anonymize your internet traffic or Torpark which is basically Firefox with an always active Tor. Most people don´t need to be anonymous all the time when they are connected to the internet. Some paranoids will disagree here but I think there is no need for anonymity if you want to check on the latest football scores or a weather report.
If you agree with me on this Torbutton might be the right firefox extension for you. You can start and stop the Tor service with the click of a button. You need to install Tor as well, download link is provided from the page above and privoxy. If you like it use it and make sure you check if its working by visiting a website that shows your IP.