Done well you have!

You've successfully decoded the encoded text and found this site. In the words of Count Dooku, though... this is just the beginning. Answer the below question and continue on, young Padawan.

Carol has used Firefox for Android to search for, browse, and save a particular image. A compressed copy of her /data/data/org.mozilla.firefox folder is downloadable here. What is the serial number of the lens used to take the downloaded picture? Add the full serial number to the end of to progress forward.

Hint: You may have to use resources outside the org.mozilla.firefox folder to fully answer this question.