A couple of things first...
1) I've not read all 175 pages of this thread
2) From what I _have_ read, people (myself included) want validator on a tab
3) Also, from what I gather... Validator not being on a tab seems to stem from the author just not getting a round tuit.
4) The author has requested (and gone to pretty decent lengths to ensure) that his work not be modified
With those things in mind, I offer this: https://greasyfork.org/en/scripts/18732 ... ehavinator
It was hacked together in an hour or so, and I offer no warranties, but it seems to work on the most recent Firefox and Chrome.
If it installs BSD on your toaster and turns it in to a decepticon... don't blame me.