Remove docs notes about old Firefoxes

docs/components/buttons.md

@@ -49,7 +49,6 @@ Use the button classes on an `<a>`, `<button>`, or `<input>` element.
 <div class="bs-callout bs-callout-warning">
   <h4>Cross-browser rendering</h4>
   <p>As a best practice, <strong>we highly recommend using the <code>&lt;button&gt;</code> element whenever possible</strong> to ensure matching cross-browser rendering.</p>
-  <p>Among other things, there's <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=697451">a bug in Firefox &lt;30</a> that prevents us from setting the <code>line-height</code> of <code>&lt;input&gt;</code>-based buttons, causing them to not exactly match the height of other buttons on Firefox.</p>
 </div>
 
 ## Sizes

docs/components/progress.md

@@ -54,7 +54,7 @@ Uses a gradient to create a striped effect.
 
 The striped gradient can also be animated. Add `.progress-animated` to `.progress` to animate the stripes right to left via CSS3 animations.
 
-**Animated progress bars do not work in IE9, older versions of Firefox, and Opera 12** as they don't support CSS3 animations.
+**Animated progress bars do not work in IE9 and Opera 12** as they don't support CSS3 animations.
 
 <div class="bs-example">
   <progress class="progress progress-striped" value="25" max="100">25%</progress>