If least likely to have 0 days is the thing I am optimizing for, what should it be?
OS requirements: Windows, MacOS, Linux, iOS a nice to have
Sub-question: Does each OS have their own historically “most secure” [1] browser, making a single browser not ideal?
[0] https://news.ycombinator.com/item?id=30572925
[1] meaning least 0 days, or maybe CTF event history?