Make Discourse play nice with the Wayback Machine

[Falco]

also, setting my useragent to Googlebot works: I see the crawler version with javascript enabled or not. It would still be nice to show that version when Javascript is disabled, for example…

It does. In Chrome when I disable JS and refresh the Let’s Encrypt page I get a fully readable page.

if I disable javascript/XHR (in uMatrix) and hit “reload”, I get the “Cannot load app” message.

There are several reports of bad browsers extensions that don’t work on service worker enabled sites: ServiceWorker thinks I'm offline when I'm not

(Also the IA user agent is explicitly in our list of crawler user agents, as I recall)

Last I checked, they send down the user agent of the user who asked the archive, making our user-agent approach useless