trouble installing Dropbox plug-in to my browser

I downloaded the most recent version of the Dropbox plug-in (from here http://omeka.org/add-ons/plugins/dropbox/), unzipped the file, and put it on my desktop. I'm using Firefox, and I opened the add-ons management tab and clicked "install add-on from file," but I couldn't find an add-on file in the Dropbox folder, just subfolders and PHP files and the like. Any ideas about what's wrong or what I might be doing wrong? Thanks!

~Jessy

It sounds like you're describing the process of adding a Firefox add-in, like a browser extension.

Omeka add-ons get installed into Omeka, and the process is generally to upload the zipped files to your server where Omeka is installed.