What is the file size of the latest version of standard Mozilla Firefox for a notebook computer?
Do you mean the download file size or the installed file size?
The installed file size should be about 28 MB on Windows, the download file size is about 8.5 MB.
Your above posted system details show outdated plugin(s) with known security and stability risks that you should update.
Update the Flash plugin to the latest version.
Update the Java plugin to the latest version.