Replace bad fonts - GitHub by Vivelin

/* ==UserStyle==
@name           Replace bad fonts - GitHub
@namespace      vivelin.net
@version        1.0.0
@description    Replaces bad (system) fonts with browser defaults, so you can pick your own.
@author         Vivelin
==/UserStyle== */

@-moz-document domain("github.com") {
  .markdown-body {
    font: 400 1.125rem/1.8 serif;
      
    &.comment-body {
      font: 400 1rem/1.6 sans-serif;
    }
    
    h1, h2, h3, h4, h5, h6 {
      font-family: sans-serif;
    }
    
    code, kbd, pre, samp, tt {
      font-family: monospace;
    }
    
    b, strong {
      font-weight: 700;
    }
  }
}