makes firefox browse to webpages and save the source code

I need some software writing that will: 1. make my local version of firefox (windows 10) browse to a webpage. 2. once the page is loaded the source code should be saved as the domain name of the site visited. e.g. [login to view URL] 3. I need to be able to supply the software with a bulk list of urls to visit (thousands). The software should visit each one in turn automatically. 4. remember, the software must be able to work with my local windows 10 version of firefox, no server side software. the latest version of firefox is: 49.0.2 kind regards