I'm a fan of Font Awesome and I think enough of it that it was actually the first bit of software I purchased for use on my side project.

I recently had the situation where most of my Font Awesome icons would show up but a few wouldn't. I knew it wasn't a layout problem because the code was all machine generated and the Amazon icon was showing up just a few lines earlier. An example of an icon which wouldn't show up is the Etsy icon.

As with almost all my crazy CSS / Bootstrap issues, I reached out to my buddy Dv and a quick pairing session set it right. The first solution we found was to add the following snippet to custom.scss in /app/assets/stylesheets:

.fa-etsy:before {
  content: "\0045"
  font-family: georgia, serif
}

And that fixed the Etsy icon – but it was really a work around and the credit goes to Hayley.cc (brilliant but still a work around). But only fixing the Etsy icon clearly wasn't enough.

Dv did some digging and came up with the thesis that the font-awesome-rails gem wasn't up to date and suggested I replace it with the CDN. So by adding this:

<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-wvfXpqpZZVQGK6TAh5PVlGOfQNHSoD2xbE+QkPxCAFlNEevoEH3Sl0sibVcOQVnN" crossorigin="anonymous">

The problem was entirely fixed. Given the problems with CloudBleed, a month ago, I'm mildly paranoid with a CDN but this did simply and brilliantly fix the problem.

Thank you Dv!