It looks like about:compat is the desktop implementation of the Go Faster add-on. https://hacks.mozilla.org/2019/07/firefox-68-bigints-contrast-checks-and-the-

It looks like about:compat is the desktop implementation of the Go Faster add-on. https://hacks.mozilla.org/2019/07/firefox-68-bigints-contrast-checks-and-the-quantumbar/ https://hacks.mozilla.org/2019/07/firefox-68-bigints-contras... Good to see this in action already.