Did you know that when visiting any website on the Internet, your browser may send a list of plugins, extensions, battery, method of connection to the Internet, not to mention the OS version and browser.
Below you can check what information about you available to sites outside.

Server information (То что сервер получает от браузера при каждом запросе)
HTTP_ACCEPTtext/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
HTTP_USER_AGENTCCBot/2.0 (https://commoncrawl.org/faq/)
HTTP_ACCEPT_LANGUAGEen-US,en;q=0.5
HTTP_CONTENT_TYPE
HTTP_ACCEPT_ENCODINGgzip
HTTP_IF_MODIFIED_SINCEWed, 20 Feb 2019 11:24:37 GMT
HTTP_HOSTen.sanstv.ru
HTTP_CONNECTIONKeep-Alive
HTTP_CONTENT_LENGTH
REMOTE_ADDR18.232.147.215
REMOTE_PORT40476
Client information (То что доступно в JavaScript)
Local IPnot found