title: Firefox completelly refuses font load due to EOT
body: <p>I noticed Firefox refuses to load custom fonts on one of my web pages. I'm 90% sure it worked one month ago. Now I use Firefox 43.04 (Windows). The error in the console is:</p>
  
  <pre><code>downloadable font: rejected by sanitizer (font-family: "PT Serif" style:normal weight:bold stretch:normal src index:0) source: https://localhost:8443/project/fonts/2/pt-serif-v8-latin_latin-ext-700.eot
  </code></pre>
  
  <p>and the html text is rendered with a system font (Times New Roman) instead.</p>
  
  <p>The relevant CSS is:
  <div class="snippet" data-lang="js" data-hide="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>@font-face {
    font-family: 'PT Serif';
    font-style: normal;
    font-weight: 700;
    src: url('../fonts//pt-serif-v8-latin_latin-ext-700.eot'); /* IE9 Compat Modes */
    src: local('PT Serif Bold'), local('PTSerif-Bold'),
         url('../fonts//pt-serif-v8-latin_latin-ext-700.eot?#iefix') format('embedded-opentype'), /* IE6-IE8 */
         url('../fonts//pt-serif-v8-latin_latin-ext-700.woff') format('woff'), /* Modern Browsers */
         url('../fonts//pt-serif-v8-latin_latin-ext-700.ttf') format('truetype'), /* Safari, Android, iOS */
  }</code></pre>
  </div>
  </div>
  </p>
  
  <p>If I remove both lines with <em>eot</em>, then it works correctly (web font is used).</p>
  
  <p>The question is, why does it reject the entire font family when the problem is just with one format?
  I need <em>eot</em> for IE (strange, <a href="http://caniuse.com/#search=woff" rel="nofollow">caniuse</a> claims IE supports WOFF since v9, but it does not seem to work with my IE11).</p>
  
  <p>I downloaded the font files thru <a href="https://google-webfonts-helper.herokuapp.com/fonts" rel="nofollow">https://google-webfonts-helper.herokuapp.com/fonts</a> </p>