Online security

Most common users believe they can not be tracking when using any VPN. That is not true. Only when using no transparent proxy nobody can see you otherwise your true ip can be read by websites using php or other languages. This is not the only way to be catched: there are several methods to identify you for example by watching user interactions or grabbing kayboard or system environment. Software behavior can betray you.
in general cookies are harmless, but they can store anything and maybe read by third parties. so you should setup your browser to its strongest blocking. localstorage is another way to store more data on clientside. if you are signed unique, you probably can be reidentified. there is no 100% gurantee! based on browsers javascript engine it will be dangerous when websites using chromes fileI/O or mozillas filesystemAPI. Files can be stored and literally get folder and file structures.
If your website is on a shared hosting, it is easily to other admins on this server to get your file and filecontent: beware!
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