I don't know about Webgl sorry just saying what I do for my tube - fookbook and other etc accounts.
Time zone is simple I use NORDVPN plugin for chrome or Firefox and use the country's IP
Create separate user instance for chrome or Firefox for each user I use to do logins, with the VPN plugin to auto connect to the country.
I use a script for peak time for each zone to login
I use random typing script to look human
And a random [every 10 - 30 tries make a mistake] retry script.
And a script that can create a new browser profile set up the plugins and login - that was tricky took me a while.
And I use Tiny 7 windows on vm's - you make a full PC VM for 1 gig of ram and 1 gig of HD space. 10 chrome and 10 FF web instances each machine
just short of 100 machines on a 250 ssd laptop with 8 gig of ram thats nearly 200 logins
Hi i have sent you a PM regarding this post, could you please check it out?