Parties and browsers

Tess calls for more precise language—like “site” and “origin”—when talking about browsers and resources:

When talking about web features with security or privacy impact, folks often talk about “first parties” and “third parties”. Everyone sort of knows what we mean when we use these terms, but it turns out that we often mean different things, and what we each think these terms mean usually doesn’t map cleanly onto the technical mechanisms browsers actually use to distinguish different actors for security or privacy purposes.

Personally, rather than say “third-party JavaScript”, I prefer the more squirm-inducing and brutually honest phrase “other people’s JavaScript”.