Search McMaster in firefox
I found the source code online and fixed it a bit so you can see the icon but now you can just put this file in C:\Program Files\Mozilla Firefox\searchplugins and then you can search mcmaster from the search field in firefox. If you are like me an use Mcmaster-Carr daily this will really come in handy. download the xml file here (right click save as)
once you download the file just place it in the Mozilla search directory commonly located here C:\Program Files\Mozilla Firefox\searchplugins