I added this to my Firefox's userContent.css:

  @-moz-document domain(soundguys.com)
  {
    #sticky-bar {
      position: absolute !important;
    }
    p, div {
      color: initial !important;
    }
    body {
      text-shadow: initial !important;
    }
  }

I use Firefox's Reader View to fix low contrast text. You need to edit userContent.css to get the full contrast:

    @-moz-document url-prefix("about:reader") {
    body {
      background-color: #FFFFFF !important;
      color: #000000 !important;
      }
    }

If Reader View doesn't work, it's usually easy to find the font color CSS in the Web Developer tools.