Sleazy Fork is available in English.
New interface to search images on Booru-style sites.
Currently the Gelbooru API needs a registered account to work. You'll need to enable cookies and then create an account/login in Gelbooru.
Log into the user's account. That is the only way currently. It will be updated with access keys in the future.
http://gelbooru.com/index.php?page=forum&s=view&id=3264&pid=50
It recently stopped working again, but only on gelbooru. Danbooru seems unaffected.
Isn't working with gelbooru
Konachan and danbooru load properly though. Awesome script, other than that issue.