Google started reporting “This webpage is not available” (and “ERR_CONNECTION_REFUSED”) if I clicked the More button, when I went to pcworld.com.
It turns out this was caused by the HTTPS Everywhere extension. HTTPS Everywhere was redirecting links from http://www.pcworld.com to https://www.pcworld.com, and PC World does not work with https!
To fix this, look in your address bar, at its right side. There is a blue circle with arrows coming out of it. Click it. Turn off HTTPS for PC World. Bask in the glory of success.