I use Firefox, and Google's sites are literally the only ones where I consistently have issues. There was a period of about a month this summer where Google Maps was just completely broken for me, the map wouldn't update at all when attempting to search or pan. There was recently a several day span where chat in Gmail had a 10+ second input lag due to some font-related JavaScript code spinning the CPU nonstop. It's l…
It's clear Google is only testing for chrome engine and safari: which comprise 97% of the browsers being used. Would you increase your testing by 50% to thoroughly test for 3% of the market?
I don't think you get to make these kind of cost cutting decisions when you're a vertically integrated mega-corp who also owns the browser with 65% of the market.