Help: Firefox Extension
There is a Firefox extension available to upload files from sites that have some sort of referrer or cookie access restriction. It is an alternative to the bookmarklet. The extension provides autocomplete for tags when adding a post or using the site.
Note that you need Firefox 2.0.x for the version 0.2.7 and above, which is also now compatible with the lolifox, but 0.2.6 is still available for Firefox 1.5.x users. On upgrading from Firefox 1.5 to 2.0 you should be automatically prompted to update to the latest compatible version.
As of version 0.2.8 the autocomplete function extends to the input fields on the site itself.

Top 20 Anime Girls With The Sexiest Ponytails
Lovely Nekomimi Ero-MMD Quite Handy
Koukaku no Pandora “Nonstop Girl-Love!”
Shoujo-tachi Mezasu Total Ota-Anime
Guro Tossed Out The Gate