Firefox extension that will help you deal with annoying banners and ads present on most webpages
Adblock Plus is an extension that will help you get rid of the ads and banners on the internet that make the loading time of a webpage a lot higher.
Right-click on a banner and choose "Adblock" from the context menu - the banner won't be downloaded again. Maybe even replace parts of the banner address with star symbols to block similar banners as well.
Or you select a filter subscription when Adblock Plus starts up the first time, then even this simple task will usually be unnecessary: the filter subscription will block most advertisements fully automatically.