Gecko is open source. They were saying it would be good to have a new FOSS browser engine that isn’t Chromium or Gecko to add some competition to the mix

Yeah I don’t see why not. The story from 1/2 has almost no impact on the plot apart from a couple throwaway references

Season 1 and 2 are total garbage. I quite enjoyed season 3 but YMMV. Season 3 is definitely worth a watch to form your own opinion