It's all the small things. Till recently there weren't even react devtools for Firefox. Almost any dev-oriented extension targets chrome first. Chrome has a great devtools protocol, and node conveniently happens to support it too, which is also why many node debugging tools will use chrome.

I use Firefox for casual browsing, but all work-y stuff I do in chrome. Sometimes I'll start debugging a site in Firefox and then some behavior is a bit "off" or missing and I just go back to Chrome.

And the only reason I'm using Firefox is because it's not Chrome. I wanted a different browser that looks a bit different to always be aware of the difference between work and personal.

It really is the small things. The one that gets me constantly is that you can't resize the columns in the Network tab.

I appreciate a lot of the stuff Firefox has been doing, but Google was very wise to realise that first class developer support was the winning move.