Make the browser forget website data (like cookies, local storage, etc.), except for the data you want to keep by adding domains to a whitelist, graylist, blacklist, or redlist. Features: This web-extension deletes data websites store in the browser in the following situations: When all instances of a website have been left: -- Cookies -- Local-Storage (Firefox 58+ only). -- History & Downloads. -- Different cleanup types can: 1 - Never: No cleaning. 2 - On Startup: Clean only on browser start. 3 - On Leave: Clean on domain leave and on browser start. 4 - Instantly: Prevent data from being set, if possible. Otherwise behave like On Leave.

When the browser starts:

• Cookies (optionally only when not whitelisted).
• Local Storage (optionally only when not whitelisted on Firefox 58+).
• History
• Downloads
• Form Data
• Passwords
• Indexed DB
• Plugin Data
• Service Workers
• Server Bound Certificates
• Cache

Delete thirdparty cookies on creation:

• When a cookie is set without belonging to a domain that is open in a tab, it is considered a thirdparty cookie.

Manually clean the above.