If you are playing Path of Exile 2, the game offers native systems that eliminate the need to use a browser for everything. Currency Exchange Visit the NPC named in town. Open the Currency Exchange interface. Select what you have and what you want.

Do you need help learning how to use for specific stats?

Accept the invite, visit the seller's hideout, and trade your currency for the item. The Modern Way: In-Game PoE 2 Trading