I always recommend setting custom user-agents for a problematic page instead of setting them globally.
For the Google issue, qutebrowser v1.9.0 does that already, see https://github.com/qutebrowser/qutebrowser/issues/5182
For the Google issue, qutebrowser v1.9.0 does that already, see https://github.com/qutebrowser/qutebrowser/issues/5182
Having a Chrome UA is a MUST on webkit based browsers if you want Google's taxing services such as Earth/Maps/Gmail and so on being faster and smoother than ever. Seriously.
Once you open Street View on luakit/vimb with a Chrome UA, the diff is night and day.
set hardware-aceleration-policy=always
set webgl=true