A poll of your friends may not constitute adequate data for making such decisions. We know for sure that techie-people and friends-of-techie-people are qualitatively different to the mass market.

These tradeoffs may also be different for different browsers. E.g. if you're Apple, perhaps breaking Web sites isn't a big deal since on iOS Safari is entrenched by fiat, and if users switch from Web apps to native apps, so much the better for Apple. For Mozilla that calculation works out differently.

Generally speaking "site X breaks in Firefox, works in Chrome" is a good way for Mozilla to lose market share.