title: What is this reddot character  doing in the URL (FireFox only)?
body: <p>I happened to stumble upon a website and the URL had a red blob in it. Seriously, I've never seen something like this. What's up with that?!</p>
  
  <p><a href="http://blacklistdeclassified.net/2015/10/30/%F0%9F%94%B4-script-35-arioch-cain/" rel="nofollow noreferrer">http://blacklistdeclassified.net/2015/10/30/%F0%9F%94%B4-script-35-arioch-cain/</a></p>
  
  <p>NB One needs to actually navigate to the page to get to see it. The below is a screenshot on my system (WinX, FF). The red thing isn't PhotoShopped. It's actually red!</p>
  
  <p><a href="https://i.stack.imgur.com/vE0di.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vE0di.png" alt="enter image description here"></a></p>