Highlight to convert currency feature like in Opera

In Opera, you can highlight “500$” and convert it to, let’s say, Euro. It will convert it and say “500$ = 411,06€” If you live in another country, let’s say Mexico, it automatically sets the target currency to Mexican Peso by looking at your location. Sometimes, you can see prices written in other currencies. Let’s say Pound Sterling, why not? It will also automatically detect the base currency by looking at the currency symbol (£) or currency abbreviation (GBP) You don’t have to set your base and target currency.