In using the HTML5 WebStorage functionality, I know that certain browsers, like Chrome, have developer tools that enable users to browse thru the contents of their WebStorag
Just wanted to contribute for IE 11. The localstorage is stored in: C:\Users[YOUR USER ACCOUNT]\AppData\LocalLow\Microsoft\Internet Explorer\DOMStore
However, it is hidden by default. To show this folder you have to: Folder Options --> Uncheck "Hide protected operating system file" Back to folder, you will see some sub folder inside. Go to each folder will see some XML files according for websites.