stop mozilla plugin prompt

<a href="http://mozilla.org/mozilla1.x/"><img src="mozilla.png"></a>
<a href="http://mozilla.org/firefox/"><img src="ff_icon.png"></a>
<a href="http://mozilla.org/camino/"><img src="camino.png"></a>
<a href="http://mozilla.org/thunderbird/"><img src="thunderbird.jpg"></a>
<a href="http://bugzilla.org/"><img src="bugzilla.jpg"></a>

Expanded
from a [mozdev.org
FAQ:](http://plugindoc.mozdev.org/faqs/firefox-linux.html#qa-nullplugin)

**Q:** How do I stop Mozilla Firefox from prompting me to install a plugin?

**A:** Delete the libnullplugin.so from your Mozilla Firefox plugins directory.
You may have to do this as root if you do not have write access to your Mozilla
Firefox installation from your user account.

**Q:** But now Mozilla just shows blank space where plugin content would be. How
do I know when I'm missing plugin content? (Or, how do I know when to feel warm
and fuzzy because I successfully avoided a flash banner ad?)

**A:** Add this CSS to your
[userContent.css](http://texturizer.net/firefox/edit.html) file:

    embed {
      border: solid;
      border-width: 20px;
      border-color: red;
    }

Now there will be a big ugly red box where plugin content would have been. Feel
free to customize the size, color, etc. to your liking.