Well Übertechnical is just a forum ranking/term chosen my the forum Administrators. Basically it equates to very, very, very, frequent poster.
Your modification of the link doesn't work because you have http in the URL, if you have that in it then you have to apply it to the http, hXXp (as in my example in the quoted text). If you are posting a URL with just the www part (no http element) then you apply it to that, wXw. So you have to break the first element of the URL or the link will be active, although would fail as here wouldn't be a wXw in the real URL.
I still don't get an alert on hXXp://wxw.kat.ph/releases/ link, so I don't know if this is an issue with something in firefox as your original process is concatenated, Process: file://C:\Program Files\Mozilla Firefox\... (the \... bit at the end). Though I suspect it would be firefox.exe, but it would be nice to confirm.
If it were some malware on your system rather than the site then I would expect it to be happening on all/many locations and not just restricted to this one URL.
Start with clearing your browser cache in firefox (the Clear Recent History option).