HTML Validator not working on FF 60 and on Chrome 66

Created by: alecos71

On Windows 10:

With FF 60 still sees the source generated by browser instead source generated by server. The Options of this extension are partial broken... not able to select GSML, always gets TIDY... partial working on FF 60, needs to be reworked again to be useful under FF 60 and more...

In chrome this extension don't work anymore... won't validate my web pages, instead to see a green flag I can see only a message "Info 0 0 No HTML" and nothing other... the flag remains gray... I'm not able to select SGML parser instead of TIDY.

I attach some screenshots...

Chrome 66.0.3359.181

html validator 01 html validator 02 html validator 03

FireFox 60.0.1

html validator 04 html validator 05 html validator 06