Retrieve email content from a dd copy of a laptop

Dear All,
I'm trying to extract the content of the e-mails (web pages) sent from a pc laptop using gmail and the browser chrome.
I analyzed the content of chrome cache contained on the laptop dd image both using "chromeCacheView" (Nirsoft) and chromagnonCache.py (from Chromagnon open source project) but I could not get a the content of most of the visited pages.

Both chromagnonCache.py and chromeCacheView are able to extract css and images, but they could
extract a renderable pages.

Does anybody known tools, method, articles and so on that could help me in extracting these information?

Best Regards,
Andrea Liguoro