I switched from Firefox to Chrome a couple of years back because Firefox always dragged its feet when it came to implementing important developer features. Like, DataView was excruciatingly slow in Firefox; WebGPU support didnt go anywhere; and they initially refused to implement import maps. I consider the latter to be an essential tool as it allows me to work without the need for build systems. Also, chrome dev tools worked far better.

Since Chrome blocked ublock, I switched to Edge. Not sure where I will go next, but I dont think it will be Firefox since they are always years late.