Downloadyze is an extension for Chrome that can download multiple pages automatically. You can download two pages at the same time. 

When you install it, you will be given an option to choose how to open multiple pages. It can be in HTML or a separate window. You will also be able to filter your files by file type, language, and text. This will also help you choose which file to download and which to skip.

To download multiple pages, all you have to do is copy the URL or click on the extension icon and a window will appear.