On any airline or travel site, CapFare shows what it costs to lock a maximum price for the flight on the page (or protect a booking against a drop), for everyone travelling.
Open CapFare →The extension reads the flight number, airports, date, fare and price on the page. Only those go to CapFare, never the page address or your details. No analytics. Prices on the testnet come from the demo price source, so cover is offered on demo routes.