If you don't want Facebook, Google, Gmail to track you - follow the steps below:

1. 
2.  Mozilla Firefox: click on Options-->Privacy Tab --> [?] tell websites I do not want to be tracked
3.  Google Chrome: click on the wrench menu (changed in updated GC versions) --> Settings --> [scroll down] Show Advanced Settings --> Privacy [Content Settings] --> Location [? Do not allow any site to track my physical location
4. Internet Explorer: Get a life and change your browser ... !!