[MyMemoryfails]

I think he means browser permissions, for example when browsers want notify or record your mic theres a permission check something similar for webgl.

[J-Kuhn]

Fun Fact: When Cookies were introduced into Netscape, you got a browser permission prompt. Then browser vendors set it to allow by default.

And then legislation required those consent boxes back, so everyone built their own, instead of demanding that the default should be changed back.