1. If you use Internet Explorer
Select Tools > Internet Options. Click on the General tab and then the Delete button. Make sure to uncheck Preserve Favorites website data and check both Temporary Internet Files and Cookies then click Delete.
2. If you use Firefox
At the top right, click the menu button and choose Options Select the Privacy & Security panel. In the History section, set Firefox will to Use custom settings for history Select the check box for Clear history when Firefox closes. Beside Clear history when Firexfox closes, click the Settings button. The Settings for Clearing History window will open. In the Settings for Clearing History window, put a check mark next to Cache.
3. If you use Safari
Choose Safari > Preferences, click Privacy Select a “Cookies and website data” option Click Manage Website Data, select one or more websites, then click Remove or Remove All.
4. Is you use Google Chrome
On your computer, open Chrome. At the top right, click More > Settings. At the bottom, click Advanced. Under “Privacy and security,” click Content settings. Click Cookies. Under “All cookies and site data,” click Remove all. Confirm by clicking Clear all.
For more information, go to the CNIL website : https://www.cnil.fr/en/search/cookie