Awesome. Works absolutely perfect.

not recognize th XMR, BEAM, XHV and maybe other. BTC, ETC, ETH is OK.

Been looking for something like this ever since I found it baked into Opera...

You also might want to be a little clearer on how to add additional coin conversions or make it a textbox or list instead.

In settings, just add all the coin abbreviations separated by a space.
Same for fiat