Anyone interested in old browser games and the like should check out BlueMaxima's Flashpoint project:
https://bluemaxima.org/flashpoint/Some text from their main page:
BlueMaxima's Flashpoint is a webgame preservation project.
Internet history and culture is important, and content made on web platforms including, but not limited to Adobe Flash, make up a significant portion of that culture. This project is dedicated to preserving as many experiences from these platforms as possible, so that they aren't lost to time. Since early 2018, Flashpoint has saved more than 70,000 games and 8,000 animations running on 20 different platforms.
Flashpoint was started in January 2018 by BlueMaxima in an attempt to outrun the disappearance of content prior to the death of Flash. It has since evolved into an international project involving over 100 community contributors, encompassing both webgames and animations created for numerous internet plugins, frameworks, and standards.
Playing around with this was an insane nostalgia trip. Also found a number of pretty awesome old games I'd never seen before.