What is a cookie?
Cookies are small data files stored on your computer by a website that you visit. Cookies have different functions. A cookie may allow the website that saved it to recognise a user, from one visit to the next, thanks to a unique identifier. Some cookies may also be used to store content in a shopping cart, others may record the language parameters for a site, and others may provide targeted advertising, process statistics and information about traffic, ease browsing and improve service, for the benefit of users.
What is the applicable legal framework? 
Pursuant to article 32-II of the French law of 6 January 1978, as amended by Order 2011-1012 of 24 August 2011 that transposed Directive 2009/136/EC, tracers (cookies and others) that require consent cannot be saved or read on a terminal unless the person has given their consent.
How can I delete the cookies related to my browsing activities on the Internet?
You can also choose to disable the cookies in your browser at any time by following the instructions provided in the help files for your browser.
Google Chrome: Go to the "Tools" menu Click on "Settings" At the bottom, click "Show advanced settings", Under "Privacy", click "Content settings" "Allow local data to be set" must be selected. Once you have done this, select "Block all cookies" 
Internet Explorer: windows-internet-explorer-delete-manage-cookies
Mozilla Firefox: support.mozilla.org/en-US/kb/enable-and-disable-cookies
Safari: apple.com/legal/privacy/en-ww/cookies/