howto open hxxp or other obscured links automatically with Firefox (without copy and paste manually)?. For non obscured links I use Linky Firefox add-on

From Wikipedia

hxxp://, sometimes h**p:// or _ttp://, is used in URLs (web links) to obscure the fact that one is linking to a http:// website. It is generally used to avoid automatic recognition by computer programs. For a user to follow this link, it is usually necessary to manually copy-paste the link onto the web browser's address bar and replace the 'x'es with 't's.

screenshot

I use RefControl, so security is not an issue.