browser-extension/.babelrc

{
	"presets": [
		[
			"@babel/preset-env",
			{
				"targets": {
					"browsers": ["last 2 versions", "safari >= 7"]
				}
			}
		],
		[
			"@babel/preset-react",
			{
				"runtime": "automatic"
			}
		]
	]
}