Works as promised, code looks good

This plugin works as advertised. I used it to prevent double emojis from showing up—unfortunately, when you include an emoji, the WordPress emoji scripts load a second emoji right after it, so you see double emoji, and if your images are displayed block you’ll see the second emoji on a new line.

I also took a look at the plugin’s source code and it looks good—just the bare minimum required to do what it says.

I would highly recommend this plugin if you like to put in your own emojis and aren’t worried about supporting older devices that do not have emojis.