Open Firefox. Click on the "Tools" menu and select "Options." Click "Privacy."
Click the drop-down menu next to "Firefox will" and choose "Use custom settings for history."
Select to accept or deny website cookies and third-party cookies. Choose how long to keep the cookies, either until they expire, until you shut down Firefox or choose to have Firefox ask you each time.
Click the "Exceptions" button to add websites to an exception list. For example, if you don't want to accept cookies from a certain website, you can enter that website in the exceptions.
Start Google Chrome. Click the "Wrench" icon to open the configurations menu. Click "Options" and choose "Under the Hood."
Click the "Content Settings" button. The content settings window will pop up.
Set the cookie permissions. Click "Allow local data to be set" to allow all cookies. Select "Block all sites from setting any data" to block all cookies. You can also choose to block all third-party cookies and erase all cookies when you exit Google Chrome.
Click "Exceptions" if you want to add a website to your exception list to either block or allow cookies from specific sites.