Cypress actually _just_ released Firefox and Edge support a couple weeks ago: https://www.cypress.io/blog/2020/02/06/introducing-firefox-and-edge-support-in-cy

Cypress actually _just_ released Firefox and Edge support a couple weeks ago: https://www.cypress.io/blog/2020/02/06/introducing-firefox-and-edge-support-in-cypress-4-0/ https://www.cypress.io/blog/2020/02/06/introducing-firefox-a... The Edge support kinda came for free thanks to its switch to the Blink engine, but the FF support had been under development for a long time.