• In Firefox

Go to "Tools" > "Options"> "Privacy" and check the box marked "Notify your site that you do not want to be tracked".
 

• In Microsoft Internet Explorer

Go to "Tools"> "Internet Options"> "Privacy" and select a privacy level with the slider
or 
Use the "Sites" option to manage settings for individual websites.
 

• In Google Chrome

Click the "Customise" button, go to "Settings", click "Show Advanced Settings" and click the "Content Settings" button in the "Privacy" section.
 

• In Opera

Click the "Opera" button, go to "Settings" > "Preferences" > "Advanced" > "Cookies" and set your cookie options from there.

 

• In Apple Safari

Go to the "Safari" menu, click "Preferences"> "Privacy"> and set your cookie options from there.
 

• For Mobile applications

Check your device's manual or your mobile browser's help file for instructions on how to change your cookie settings. Alternatively, instructions may be found on the Internet at your device manufacturer's or browser's websites.