I feel you. When creating an UI you can think of thousands of possibilities which might not be clear to someone however obvious they seem and then design it in a way that couldn’t possibly be misunderstood, then show it to different people who all agree that it’s clearly structured and logical… and the minute you release it you get posts from users where you ask yourself how they could even exist on their own.
I don’t use many extensions, but apart from the usual UBlock Origin I’ll say something exotic: UltraWideo
Because sites like disney+ still don’t know that 21:9 monitors exist so you have to force it to scale their 21:9 films to your monitor instead of giving you black bars on all sides