Uh no, means that you can make it work and some people are willing to spend the time to do it right. You'd think that if Mozilla can afford to do this so could Google. The only way the problems in the drivers can get fixed is through usage, if Chrome flat out refuses to work with the driver then the issues can't be fixed.
This also illustrates why it's important to have alternatives to Chrome for anybody who cares about open source.
I assess with high confidence that that was a satirical comment.
It could be working on FF only through a quirk in their rendering, rather than a testing. Chrome certainly has a test suite -- did anyone run it with nouveau and turn bugs into PRs? And arguably, that job belongs to the desktop owners, as well as the nouveau and chromium teams. Browsers are insanely complicated, and who is paying for this work?
If I could make my employer pay for a meaningful number of Ubuntu desktop licences I would, but TBH I need it to work with the nVidia driver not nouveau.
Maybe it's working through a quirk, or maybe Firefox team writes better code that handles a wider range of drivers. I choose to use Firefox because the team behind it cares about my needs. If Google can't afford to make a browser that works with open source drivers, I will simply choose not to use it and encourage others to use Firefox instead. This is precisely why having alternatives to Chrome is important.
This also illustrates why it's important to have alternatives to Chrome for anybody who cares about open source.