SIMPLE FIREFOX EXTENSION ADD/ON

Need an extension or add on to firefox that reads in a ASIN on am amazon site (via their URL) , based on that asin sends data to a url. For example, on amazon page "http://www.amazon.com/gp/product/B00LN0NUOO/ref=br_asw_pdt-4?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=desktop-5&pf_rd_r=15HNDCXWB7YQY7AAZCNA&pf_rd_t=36701&pf_rd_p=2048138162&pf_rd_i=desktop" -- take the ASIN part of that "B00LN0NUOO" -- and send it to a url, There is an extensions that doesn somethign similar called FBA calculator. I just need it to send it a a URL of my choosing. We should be able to press a icon in the browser and this should happen.