Hello!
Sometimes I need to know vendor of the devices, if I have MAC, I can open web site and like aruljohn.com and check vendor.
But I want speed up this proccess and wrote FireFox extension which show vendor when You selected MAC address or click in "edit" field in web form, You can read vendor in popup div.
But please tell me, if extension will not work as expected.
Link for download:
https://addons.mozilla.org/ru/firefox/addon/mactoven/