Checks whether this browser can show Google Pay and Apple Pay, and whether autofill works. Nothing is charged: Google Pay runs in Google's TEST mode.
To test inside Facebook: send yourself this link in Messenger or an Instagram DM, tap it there, then compare with Chrome.
Try Google Pay: tap the button. If the Google Pay sheet slides up, it works here. Close it or pick a card; nothing is charged.
Try autofill: tap the email box. Your phone should offer to fill it.
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Send me the results: tap Copy, then paste into our chat.