Cosymantecnisbfw bug and auto injection of additional HTML code

Hi all, I am writing on behalf of my daughter. She has a web site at:
http://www.bestdayeverimages.com
which is suffering badly from your product injecting additional HTML code into her text boxes when she edits her WIX store page, that she is trying to set up.

The web site simply won't load on a PC that is running Firefox.

There are many threads in both Nortons and WIX support Forums, plus other sources, that support that this bug exists.

https://wordpress.org/support/topic/some-codes-auto-added-when-i-create-a-new-post
https://www.wix.com/support/html5/ugc/a941f5b7-fa83-4540-b9a4-a1d3f2e0dc68/bea74d3b-814e-48e5-a401-460560415004

You admit to the bug back in Feb-2014, and state that the bug has been fixed in this thread:
http://community.norton.com/forums/norton-identity-toolbar-firefox-26-adding-unwanted-code-forum-posts

Should my daughter be downloading a bug free version of Nortons from somewhere, and has this bug actually been fixed?

She runs a Mac book pro, and the problem is appearing on all PCs that are running Firefox.

Thanks in advance,
Cheers Don...