I use Firefox developer edition as my main browser, and there does seem to be some issue with Angular sites. admin.google.com is particularly bad – but so bad it makes me wonder if they only test in Chrome.
Error logging used to be broken in Firefox at least until last year. I'm not working in frontend at moment and I never got around to submitting a bug (it always happened while at work) but my opinion was that there was a bug somewhere in there where they used a Chromium only API.
And yes, I too have wondered if they only test in Chrome.
And yes, I too have wondered if they only test in Chrome.