Big thanks to the developer, great app. Does exactly what I want, it allows me remove things from a web page.
You'd think that it is common sense that if you reload/refresh the page the items will come back on, imagine the complaints if they didn't come back and people deleted parts of a page by mistake.
Can it be better? ... maybe, so why don't people try to design their own add-ons for Firefox? Then they can get complaints from strange people from a product that is free.