For all us Web Developers there is the WebExtensions API detailed here (https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions) on the Mozilla Developer Network made by Mozilla, but for Mozilla we have this "AI Controls" mess, the most incredible display of "what is consent...really?"
AI Controls (formally 'kill switch') are landing in today's Firefox Nightly, and will land with Firefox 148 later this month.
For the full details, see the Firefox blog https://blog.mozilla.org/en/firefox/ai-controls/