as one of their customers, I second this

Is there a web archive equivalent to github repos? At least for the most popular ones.

I know there are hard copies in Svalbard’s seed vault, but they’re more for a one-in-thousands-of-years post-apocalyptic scenarios than this.

it’s based on this gist - follow the instructions at the top: you’ll need to set the right Sidebery preface to make it work, it’ll let you toggle it on and off easily.

sidebery + custom userChrome.css to make it collapse when the mouse leaves the area.