To delete your browsing data in Jatter, go to Settings > Privacy and security > Delete browsing data
From this page you can choose the timeframe from which you wish to delete your browsing data. The Basic tab options allow you to choose to delete or not delete Browsing history, Cookies and other site data, and Cached images and files.
The Advanced tab options allow you to choose to delete or not delete the same options as the Basic tab, with the addition of Passwords and other sign-in data, Autofill form data, Site settings, and Hosted app data.
You can also reach the delete browsing history page by going to History > Show full history > Delete Browsing Data
