Using Opera only superficially sidesteps the big Google problem, as you still contribute to the Chromium monoculture that reinforces Chrome's dominance and benefits Google.
It had been blocked by webrender if I remember correctly, now the work on fixing this issue has actually started. Markus Stange is a capable engineer as well so there's hope.
However when I develop I always develop for Firefox first, but the Firefox developer tools are starting to age as well.