https://html.spec.whatwg.org/multipage/introduction.html#introduction
https://developer.mozilla.org/en-US/docs/Mozilla/Gecko/Versions
https://www.ecma-international.org/ecma-262/9.0/index.html

https://whatismyipaddress.com/
https://moz.com/blog/local-search-ranking-factors-survey-results-2017
https://developer.mozilla.org/en-US/docs/Web/HTML/Element
https://html.spec.whatwg.org/multipage/#semantics.html#the-main-element

https://www.whoishostingthis.com/tools/user-agent/
https://developers.whatismybrowser.com/useragents/explore/
http://webkay.robinlinus.com/
https://clickclickclick.click/#c0ed615dfac6fda3e437b12b2f073b67
https://panopticlick.eff.org/
https://w3c.github.io/webcomponents/spec/custom/

https://en.wikipedia.org/wiki/Comparison_of_browser_engines
https://grosskurth.ca/papers/browser-refarch.pdf
https://www.slideshare.net/myposter_techtalks/how-browsers-work-74804349

https://gizmodo.com/how-to-avoid-getting-tracked-as-you-browse-the-web-1821008719