Clear-Site-Data header tells the client browser to delete browsing data for the origin/domain. The accepted directives are
* (wildcard), e.g.:
Clear-Site-Data: "cookies" Clear-Site-Data: "cache", "storage" Clear-Site-Data: "*"
The downside is that this is still an experimental and unstandardized feature which works only on recent versions of Chrome/Firefox. More information can be found on MDN.