I'm excited to share the latest update from Webrecorder project, the release of a new OldWeb.today (https://oldweb.today), now running emulated browsers using JS/WASM entirely in your browser!
The IE and Netscape browsers support older versions of Flash and Java. For good measure, there is also an option to run just the Ruffle emulator (discussed at: https://news.ycombinator.com/item?id=25242115) for Flash-only emulation in your current browser.
The system can browse live web pages as well as archived pages from Internet Archive's Wayback Machine.
OldWeb.today can be deployed as a static site and connected to other archives as well. (Only a server-side CORS proxy is necessary, for connecting to external websites or archives)