I mean, I like Firefox, but I’d love to see Vivaldi based on Firefox/Gecko. There’s Floorp, which is similar in some ways but it’s more like an Edge built on Firefox than Vivaldi.
Edit: Thank y’all for your answers. :D
I want to link !@[email protected] 's post because it is a similar quesion. https://thelemmy.club/post/718914
They both are of very similar age actually. The old Netscape rendering engine originated in the early 90s, but Gecko was a rewrite from scratch that was first used in a browser in 1998.
Blink is based on KHTML which is based on khtmlw, which was written at some point in the mid-90s, but as well saw a complete rewrite in 1999.