Feature Request: Option to use system emoji over Twemoji

[LittleLilyBun]

As title says, I'd like an option to make the emojis on Twitter to match my system's emoji, rather than using Twemoji, it makes Twitter look out of place compared to almost every other website.

[insin]

We'd need to use JavaScript to manually replace Twitter's rendered emojis with their own alt text to do this, as it's not possible to replace an image with its own alt text using CSS: e.g.

<img alt="🫡" draggable="false" src="https://abs-0.twimg.com/emoji/v2/svg/1fae1.svg" title="Saluting face" class="r-4qtqp9 r-dflpy8 r-k4bwe5 r-1kpi4qh r-pp5qcn r-h9hxbl">

Be hard to catch everything without constantly re-running selectors for these (which is something we try to avoid doing, observing {subtree: true, childList: true} document-wide is a no-no), but it would be doable in timeline content.