I checked and agree this page does not pass validation

• http://validator.w3.org/unicorn/check?ucn_uri=https%3A%2F%2Fsupport.mozilla.org%2Fen-US%2Fquestions%2F992639%23answer-551039&doctype=Inline&charset=%28detect%20automatically%29&ucn_task=conformance#

That validator is an official w3.org validator

• http://simple.wikipedia.org/wiki/World_Wide_Web_Consortium
• http://www.w3.org/

I suppose it could be expected these pages would pass validation. I will mark this for escalation lets see what HelpDesk's observations are on that.

I also note that html tidy appears to be a utility originating from w3.org

• http://www.w3.org/People/Raggett/tidy/

As for your own problems with web design that would best be discussed elsewhere.
Ordinarily I would say a Mozillazine forum may be a good place to try

• http://forums.mozillazine.org/viewforum.php?f=25

Now that Webmaker have a presence on this forum it may actually be worth asking again and specifically asking from

• https://support.mozilla.org/en-US/questions/new/webmaker

IF you are attempting to use any Webmaker advice or product

• https://webmaker.org/

Could we add this to a bug with web compatibility team as well as in the support.mozilla.org component of bugzilla. http://validator.w3.org/unicorn/check?ucn_uri=https%3A%2F%2Fsupport....

HTML5 validation and Web Compatibility in Firefox is something we can strive for and there has been a site developed by a Mozillian to address these compatibility issues. http://dev.webcompat.com/about Please read more about this project and add a description to the bug you file for validation. You are not doing anything wrong, just to clarify.

I will also start a bug in the forum as improvements are being made this quarter and next. Thank you!

I have filed the bug [Bug 990816 - HTML Validation for Web Compatibility in sumo support forum] Please post your comments on how to improve the forum for HTML 5 validation there as well :-)

Bug 990816 _{edit. added link ~J99}