Function normalizeScriptRealm

src/background/utils/preinject.js:110–112

(custom, meta)

  KNOWN_INJECT_INTO[val] ? val : injectInto || AUTO
);
const normalizeScriptRealm = (custom, meta) => (
  normalizeRealm(custom[INJECT_INTO] || meta[INJECT_INTO])
);
const isContentRealm = (val, force) => (
  val === CONTENT || val === AUTO && force
);