In app browsers

on YouTube ↗05m

" summary

A web quiz that posts to Pinterest fails for Facebook referrals because the in‑app browser does not persist cookies, so OAuth redirects repeatedly reset state. Debugging uses a web console service and repeated reinstalling of the Facebook app because the embedded browser lacks accessible devtools and won’t clear cache. A working fix is to store answers in localStorage as a state fallback and detect OAuth URL fragments to restore the quiz.

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