Notices by Sparr (sparr@mastodon.social)

@whvholst How many other browsers (or, more specifically, rendering and/or javascript engines) did you try on? Two data points doesn't give much indication of their standards support.

@whvholst Epiphany is a Linux (etc) web browser that uses the same rendering engine as Safari.
Edge is available, in a dev version at least, for Linux.
Or just use third party platforms to check. If the problem is visible on a page that isn't behind a form, just point browsershots or a similar service at it.