So Disqus has not been working for me for some time, and they finally, handily, added a little notification that it's due to third party cookies being blocked. Great, I said, let's take care of that.
So I added an exception for disqus.com to Chrome's preferences, but it does not seem to be working. I did this vis Preferences -> Advanced -> Content Settings -> Manage Exceptions, where I have added an 'allow' exception for disqus.com. I have third-party cookies otherwise blocked.
Disqus still doesn't work, though, giving me the same error on every site that it's unable to work with third party cookies. The error persists even if I go to disqus.com and login, then revisit a site.
Why might disqus be failing here?
The reason is that you have to tell Chrome to allow 3rd party cookies for subdomains of disqus.com as well. So just set the exception to this instead: [*.]disqus.com.
Disqus requires you to accept third party cookies. If you want to use it, you have to turn them on and take your chances with the bad guys who use them for nefarious purposes.
来源：https://stackoverflow.com/questions/10710944/why-are-chrome-exceptions-for-third-party-cookies-not-working-results-in-inabil