Remove any post that contains the strings in strings2block. Initially it contains buzz, feed, and buzzfeed.

Goodbye Buzzfeed

var posts = document.getElementsByClassName("userContent");
var strings2block = ["buzz","feed","buzzfeed"]
var doesPostContainBlock = function(postContent, blockContent){
	for (y in blockContent){
		if(postContent.search(blockContent[y])>0)
			return true;
	}
	return false;
}


for (x in posts){
	result = 0;
	content = posts[x].innerHTML;
	if(doesPostContainBlock(content,strings2block))
		posts[x].innerHTML = "";
}

Instructions

• Press ctrl+shift+i
• click the "console" tab
• paste the code from here
• press enter