Web browsers are for serving website content, their job isn't to moderate content especially at the level you're describing. If you want to write your own filte

Web browsers are for serving website content, their job isn't to moderate content especially at the level you're describing. If you want to write your own filter/extension to preserve your eyes from being exposed to unfamiliar words, you're free to do so. Wikipedia has Simple English - https://simple.wikipedia.org/wiki/Simple_English_Wikipedia https://simple.wikipedia.org/wiki/Simple_English_Wikipedia - maybe you're looking for something like that. But the idea that we should be discouraging difficult words, or that this should be done at a browser level is terrible in many ways.