Install

You can change your emoji style (better, your emoji font family) in the add-on Settings. To open the Settings, please open the popup and click on the "gear" icon at the top-right of the popup.
You'll get the Settings of the addon!

Scroll to the "Emoji style" section and choose your favourite emoji style, that will be used in the entire Emoji add-on!

Emoji Settings > Emoji style (font family)

You'll be able to choose Twemoji (the ex-Twitter emoji family), Noto Color Emoji (the Google one), OpenMoji (color) and OpenMoji (black) which are open-source font families, and the last one is the OS emoji font which will use the default emoji font family of your OS (e.g. if you use Windows, it will be used the Microsoft emoji style; if you use macOS, it will be used the Apple emoji style; ...)