You can launch 5 instances of your web browser, then maximize each one to each monitor. Is that what you're looking for, or are you looking for a way to automate that with DisplayFusion?

This is possible using the DisplayFusion scripting. You can download and modify an example by opening the Settings > Functions window, then clicking the "Download Script" button. Look for a script called "Open 3 Sites Maximized on 3 Monitors (Internet Explorer)". If you need any help modifying it just let me know.

Thanks!