Summary:
The border-{start,end}-{start,end}-radius CSS properties are flow-relative
versions of their corresponding physical property, border-top-left-radius etc
Bug:
https://bugzilla.mozilla.org/show_bug.cgi?id=1520684
Link to standard:
https://drafts.csswg.org/css-logical-1/#border-radius-properties
Platform coverage: All platforms
Estimated or target release: Firefox 66
Preference behind which this will be implemented: None
Is this feature enabled by default in sandboxed iframes? Yes
DevTools bug: N/A, devtools support is included in these patches
Do other browser engines implement this?
I don't know, there was no WPT for these.
web-platform-tests:
I added one: css/css-logical/logical-box-border-radius.html
Is this feature restricted to secure contexts? No
/Mats