And it is by uMatrix, it has prevented the following page from loading:
-http://widget.yavli.com/wcr.html?u=www.gospelherald.com/2015/240/7NfAGxWb/4722/pro-golfer-were-exercising/1442,4705,4722,4275,4287,4274
See: https://www.virustotal.com/nl/domain/widget.yavli.com/information/
Has been around a while now: https://lists.emergingthreats.net/pipermail/emerging-sigs/2014-November/025195.html
<!DOCTYPE html> <html lang="en"> <head> <title>The new HeroFW app</title> </head> <body> <h1>Hi, I am your new HeroFW app!</h1> </body> </html>
Trying to get around adblockers, read this: https://adblockplus.org/forum/viewtopic.php?p=112078#p112078
and here: http://comments.gmane.org/gmane.comp.security.ids.snort.emerging-sigs/22309
polonus