Devtools are baked into standard chrome. I find it odd I'd have to download a special version of Firefox made for developers.

Devtools are also in standard firefox. The developer edition just includes new features that haven't yet made it to the current release. The chrome analog is Chrome Dev (https://www.google.com/chrome/dev/)

Firefox: Nightly -> Developer -> Beta -> Stable -> Extended Support Release

Chrome: Canary -> Dev -> Beta -> Stable

Firefox is actually Nightly->Beta->Stable->ESR, where Developer Edition is a differently configured build of Beta.