barbone User

hello
there is a Firefox addon https://addons.mozilla.org/en-US/firefox/addon/load-from-cache/
which 2 state of it cause all or some resource load from cache
its excellent however its cause problem with some site or some service like captcha
example captcha wont update.
so is there any way to do with userscript to not allow addon to force in cache in some url?

or even can somebody make userscript to load image from cache with include and exclude option?

thanks