You know, I'm something of a browser extension creator myself
Control Panel for Twitter improves Twitter somewhat: https://jbscript.dev/control-panel-for-twitter
Control Panel for YouTube improves YouTube somewhat: https://jbscript.dev/control-panel-for-youtube
Comments Owl for Hacker News makes it actually possible to follow chat threads here over time: https://soitis.dev/comments-owl-for-hacker-news
AI Overview Hider for Google: https://soitis.dev/ai-overview-hider-for-google