I use a website and they have some really annoying icons on the forums
I'd like to use Ad-Block Plus to swap the images out for one of my own (either on my computer or hosted on a site)
Is there a way to use filters and do this?
Using Ad-Block to Swap an Image for Another
you can use the My Image Here add-on:
https://addons.mozilla.org/de/firefox/addon/3811
https://addons.mozilla.org/de/firefox/addon/3811