While surfing in Hard Software you can enable/disable some configs so you have a better experience; The configs you select will be applied immediately, but if you want your selections to persist at every visitted page, you must enable the option "persist configs in localStorage" - by doing so you authorize the use of the localStorageApi, which will store few amounts of info the javascript will use to reapply your selections at every page access. The default value for all options is disabled, and are described below; by the end of the page is your localStorage config values:
Storage { "theme": "theme-value" }
Storage { "website-mode": {("dark")|("light")} }
Storage { "enable-localstorage": "true" }
Storage: { "enable-animations": {("true")|("false")} }