Opera browser has a built-in currency converter that can scan numbers with currency symbols on web pages when that text is selected and display it’s equivalent value in another currency. This feature is enabled by default but it displays the output currency value based on the location during installation of Opera.
To change this :
Access Opera settings through (Alt+P) or Menu>Settings.
Go to Browser section.
Ensure that the the tick next to On text selection is enabled and choose the desired output currency from the drop-down box.
From now on, when the currency specific text is selected on web pages, a pop-up will appear that will display the value in converted currency.
Pretty handy feature to have, just like the free VPN feature.