How can I access the folders where Firefox mobile stores its application data I know the information is supposed to be at data/data/org.mozilla.firefox/ but I cannot seem to view/access them.

My device is rooted, and I've checked device storage as well as external storage, using multiple file browsers.

Specifically I'm trying to find where it stores the information that it saves for the top sites tab.
Apps on Android store their data in /data/data/[package_name],
so Firefox should be keeping its data in /data/data/org.mozilla.firefox.

NOTE: To access this directory you need root access. 

Use file:///data/data/org.mozilla.firefox/ from inside Firefox to access the folder (without root). This work because Firefox owns the folder (see the comments)