Found this on another forum. I don't use Firefox so can't check it myself.
" I went to the Tools bar at the top of the browser, clicked on Options, then under the Content tab it is checked to Load Images Automatically. Next to this option there is an Exceptions button. When I clicked on that, Amazon was listed in my exceptions. I removed that site and refreshed the page. Back to normal!"
If that doesn't work I would try a different browser to see if that helps. If not then there are a lot of other reasons a particular site might be blocked.
" I went to the Tools bar at the top of the browser, clicked on Options, then under the Content tab it is checked to Load Images Automatically. Next to this option there is an Exceptions button. When I clicked on that, Amazon was listed in my exceptions. I removed that site and refreshed the page. Back to normal!"
If that doesn't work I would try a different browser to see if that helps. If not then there are a lot of other reasons a particular site might be blocked.