Internet connection completely dies if I open too many browser tabs at once... WHAT?

Originally Posted by Cellius

Is that feasible? This has only just started happening in the last few weeks, and I've been on my current ISP for about six months.

Yeah, I think that is feasible. All internet browsing (http protocol) occurs over a few ports that are set. That way, it is possible for them to throttle your internet for those ports should they detect what they might determine is unusual behavior (several simultaneous page requests can potentially look like a browser-refresh DDoS attack).

Not too long ago, (a couple weeks really), the 7chan and 4chan people raided several "offending" websites, bringing them down with a variety of different attacks. One of the easiest ones for an attacker to implement was a refresh-DDoS attack.
I would not be surprised if your ISP was thinking that they were cool if they could prevent these sorts of things from happening.

Out of curiosity, who is your ISP?

Probably the best thing for you to do right now is to actually contact your ISP and ask them what is going on.

Jam it back in, in the dark.

Do you know who your ISP is?
Lets just start there.

There's nowhere I can't reach.

http://www.showmyip.com/
Sorry. I should have linked that earlier. That website gives all sorts of details about your connection, including IP address, ISP, etc.

This thing is sticky, and I don't like it. I don't appreciate it.