I was having trouble with what I thought was Firefox causing freezing of my brand new PC. It wasn't that, it was this add on. After removing it everything is working again.

Nice and easy to use

FUNCIONAL+BONITO

Is it possible to remove/clear items from the recent section?

It doesn't have all emojis
But the interface is good and how the organize emojis.

Una herramienta muy útil. Una manera mucho más liviana y rápida de insertar emojis en sitios como Facebook (en el que la ventana de emojis integrada es incomprensiblemente lenta y pesada) o Twitter.

It would be so much better if you add some sort of floating button, next to the active input box

es muy buena instalalo

does not work on sites such as Tumblr when using desktop windows pc.

Why in asked authorizations during installation this crap needs to access to all open tabs and all websites data ???
Other extensions like "Emoji cheatsheet" or "Unicode Emoji" works great and don't needs this. That's more privacy respectfull !