Probably too long and could be worded better. I can't figure out what license there is for this site/repo but feel free to edit mercilously. ;-) (as wikipedia's edit box warns)
…ts, plus a crap example of strong
…ossibly added after W3Fools went live.
While the original content is technically false, it is presumably just an attempt to explain things in simple terms, so a softer term may be more appropriate. Different browsers have different default stylesheets (even if they are similar in many respects) so this should be a plural.
…y have fixed it since this page was written.