Maybe you should learn what was the process followed to create Web Applications. This should take you to learn about https://area51.stackexchange.com/, then to https://area51.stackexchange.com/proposals/57?phase=definition
Besides the link provided in [the other answer](https://webapps.meta.stackexchange.com/a/4745/88163), other links were "greasemonkey" is ...
They are first mentioned here: Are questions about browsers accepted as long as they are related to using a web application?. I wasn't there at the time, but it seems a logical extension from bookmarklets.
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Web Applications is a question and answer site for power users of web applications. It's built and run by you as part of the Stack Exchange network of Q&A sites. With your help, we're working together to build a library of detailed answers to ...