It's cool to support GM.* APIs on the side of current ones. And TM had already do so in beta channel. And these APIs may be implement on top of current ones with a thin polyfill. So, maybe it's time to add such supports.
Related link on the Greasemonkey blog https://www.greasespot.net/2017/09/greasemonkey-4-for-script-authors.html
Direct link to polyfill: https://github.com/greasemonkey/gm4-polyfill/
+1
+1 we need it
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Direct link to polyfill: https://github.com/greasemonkey/gm4-polyfill/