you need to use javascript to install themes in firefox and mozilla.
this is what i did.
1. put all your themes's jar files in one directory.
2. create an html file where the contents will look like:
Code:
<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="content-type">
<title>Install Smoke</title>
</head>
<body>
<!-- copy the a href line as many times as needed -->
<a
href="javascript:void(InstallTrigger.installChrome(InstallTrigger.SKIN,'smoke_fb_8-2.jar','Smoke'))">install Smoke skin</a>
</body>
</html>
the part that you're interested in is the < a href = part.
Code:
<a
href="javascript:void(InstallTrigger.installChrome(InstallTrigger.SKIN,'smoke_fb_8-2.jar','Smoke'))">install Smoke skin</a>
create as many of these tags as needed. it's pretty self explanatory. after InstallTrigger.SKIN, you put in the filename of the jar file and after that is the title of of the skin that is displayed in the themes manager (i think).
3. open up this html file in firefox/mozilla and click on the links.
edit: mpetrov's extension suggestion sounds better. I didn't know about the extension - that's good to know. i'm using an older version of firefox, so the drag and drop doesn't work for me.