> Fyi you need to optimize for two browsers only: chromium (edge) is the webview on windows, and webkit is the webview on linux and macos.

You're right, I keep forgetting that Microsoft has switched to Blink. It's still a pain if you're a Windows dev who needs to test on WebKit. Or is there an easy way to test that these days?

> I’m curious about the svg and flexbox issues you mentioned. I have not experienced any differences with those across systems and browsers.

To be fair, the differences I was thinking of were mostly between Gecko and Blink, so they're not really relevant to Blink vs WebKit. It's been many years since I've worked directly with SVGs, but I remember there being major differences between how different browser engines interpreted masks and some other features of SVG. I also think they scaled SVGs differently. The flexbox issue I'm thinking of had to do with how Gecko and Blink handled `height: 100%` inside a flexbox container that does not have a set height. I don't remember the exact difference, but I think Chrome assigned a height of 0 to the element, whereas Firefox greedily took up all of the available space, or something like that. Like I said, it's been a few years, so take all of that with a grain of salt. I just remember spending far too much time debugging those sorts of issues. :)