Forums mIRC Help Mirc and links in Firefox

Used to be able to do this.... but since fomatting the HD, won't work.

When I am using Firefox, and find a link that I want to open in MIrc, how do I do this.

I want to click on the link, have Mirc open, then have it connect to the server, channel and do the /msg <bot> xddc.... that the link calls out.

Any and all help would be appreciated.