I'm back on the Arc browser, which is mostly great, but I've noticed it doesn't do paint holding (https://developer.chrome.com/blog/paint-holding). Every other browser nowadays will hold same-origin navigations to prevent a flicker on navigation on static sites, but oddly Arc flashes the background color.
I filed a bug – for a UX nit in a deprecated browser, so it will likely go unfixed. But Atlassian’s CEO uses Arc as far as I can tell? So who knows