Board Thread:Support Requests - Getting Technical/@comment-4022888-20170608232257/@comment-9605025-20170609185222

Yes, but developer.mozilla.org is specific to Mozilla FireFox. The details in some behaviors may not apply to other web browsers. Also, they may not support certain CSS that others do. The following is probably the best source but does not provide interactive examples.

http://www.w3.org/Style/CSS/specs.en.html