I'm wondering if there is a way to detect installed plugins on different browsers. So far I have found that you can "detect" plugins on firefox by trying to guess if chrome://path/to/some/plugin/image.gif exists.
This code for firefox looks like this:
<img src="chrome://firebug/content/blank.gif" onload="var a=document.getElementById('FireBug'); a.innerHTML = 'You are using FireBug';" style="visibility:hidden">
<div id="FireBug">You are not using FireBug</div>
I'm interested how does the code look in IE (more important to me) and if there are other ways to accomplish this task for other browsers too?
I want to know because I'm having an idiot client who claims he doesn't have installed plugins though I'm 99,99% sure he has. The problem is that some of those plugins are breaking parts of a web site admin control panel I've wrote.
Anyway I'd be glad to hear any tips,tricks,workarounds and etc for getting the plugin list of the popular browsers (ff,ie,opera,chrome,safari) :)