User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0 To download a thunderbird theme you need to download a .jar file. The instructions are: Right click and choose "Save Link As...". But if you do that you will get a save link as, but with the default filename "install.php" and the extension drop-down in firefox is "text file". I belive that you just need to send the http-header "Content-filename: <themename>.jar" or something. That would be a great fix. Currently it's a hassle to download and preview themes. I also miss more screenshot-previews, but that's another issue, and it's proberly just because of the theme-developers. Thank you, Seph Reproducible: Always Steps to Reproduce: 1. Find a theme, click it. 2. Right click, choose "Save Link As..." Actual Results: Save-file dialog pops up with the default filename "install.php" and the extension drop-down only has one option, which is "text file" Expected Results: Save Save-file dialog pops up with the default filename "<themename>.jar" and the extension drop-down should be "jar file" or something like that.

*** This bug has been marked as a duplicate of 275900 ***