[techwizrd]

I think what you're describing is not incompetence, but Hubbard's corollary to Hanlon's Razor:

"Never attribute to malice or stupidity that which can be explained by moderately rational individuals following incentives in a complex system."

We should aim to have incentives that produce the behavior we want, which is that YouTube should function the same in Firefox as it does in Chrome.

[tehlike]

Good way to explain it - yes, incentives.