[tor-talk] noscript on youtube

[krishna e bera]

When trying to login to Youtube from TBB, NoScript blocks a bunch of 
stuff seemingly related to fonts (see screenshot at 
https://postimg.org/image/c0sfrf2kh/41fa1875/ ), and i cannot proceed 
(the Sign In button doesnt work.  Otherwise Youtube works fine with 
HTML5 videos.
The website's font ought not matter when trying to login.  Is there a 
TBB exploit related to fonts and javascript that would deanonymize 
users?  Why else would Google require a browser to get code from 
fonts.gstatic.com?