firefox/opera proxy plugins?

[DragonBlaze]

So yeah, my school web block is pretty stupid. After a little experimenting, I got a portable version of firefox up and running (our school uses IE) from my jump drive after I was able to find the right ip adress and port that my school uses. All the blocks are still up though... Anyway, does anyone know of any proxy type plugins you can download for firefox or opera that would act like a web proxy? I've seen things around like this before, but a lot of them are spywere or will be installed over IE or the whole computer, and if I would try something like that with IE on my school computers, they'd ban my account... again... (though I can boot up linux from a disk or just get the admin password if I needed to get on).

So yeah, if anyone knows of anything that would work, let me know


For  the moment I'm just using web proxies, but they just updated the block again and none of the ones I knew of worked anymore, I found another good one, but I don't know how long it'll last.