The pad was written using browser extension called [GreaseMonkey](https://addons.mozilla.org/en-US/firefox/addon/greasemonkey/) + a [custom user script](https://addons.mozilla.org/en-US/firefox/addon/greasemonkey/). This hack is described [on this pad](https://pad.xpub.nl/p/greasemonkey).
A sample pad is [here](https://pad.xpub.nl/p/radioworm-20231107).