Why does id.tmtm.ru strongly oppose the use of a Google account?

Question

Google

I suddenly noticed a strange thing. During login, I see icons of several networks, but the G+ icon is not among them - it is hidden via css and inactive (but turns on in the mobile version a second after the page loads).
After logging in with a password, I found that my G+ account was unlinked. I tried to bind, but could not - the popup with the first stage of Oauth2 did not appear.
Not that it was a big problem, but it's a pity that I lost the most convenient way for me to enter. Will it always be like this now?

Answer 1

I believe that the root of the problem is that you have the tracking protection option enabled in your browser, browser extension or network filter (such as AdGuard), which cuts out the button and blocks the work of scripts associated with it.