Feature Requests Rated 5 out of 5 stars
Please add other caches to your list of caches:
* Yahoo! Cache
* MSN Cache
See https://addons.mozilla.org/en-US/firefox/addon/2570 for URL templates.
Also, please add to the list the www-subdomain and subdomainless versions of the site.
You should be able to add any you want
Use the custom-tools part of Neo Diggler's preferences window. Email me if you are struggling, and I'll try to help out. I'll post any working ones here.