Ask HN: What is the most frustrating in web extension development?

Living in constant fear that a Google algorithm may someday decide to ban our extension without providing a reason, advance notice, or a meaningful appeals process. It feels like there's some new horror story describing this situation at least once a week here on HN.

Safari. Pretty much everything else you can test on any PC (macs included). And afaik only Chrome and Apple charge for publishing, and Chrome is cheaper.