i can see images, it's just when i click on direct links to images that it tries to save them instead of opening them. haven't changed any firewall settings so cant see it being that
go to firefox tools/options/downloads and under file types see if there is anything related to pictures such as jpegs etc. maybe you have set it to download every time by accident?
could always uninstall firefox, view the hidden files and folders within the firefox directory and delete them if there are any left, then run a reg cleaner such as reg mechanic (tis excellent and well worth buying) to clean up all the crap then do a reinstall.
would only take 10 minutes to do it though so wouldn?t be too bad. just get a good reg cleaner, i can recommend reg mechanic, it's fecking brilliant and the latest version (3.0 i think) is even better. costs about ?20 to buy on the net but worth it as it keeps your system free of broken reg links and a whole host of other shit.
on a side note i spend a few hours on sundays doing maintenance on my pc such as reg clean, virus adware scans, defrag (perfect disk 7.0 is fecking excellent for defragging), use ashampoo win optimizer for crap removal etc etc and doing it always keep's my pc running nice and smooth.