[HackerDude]

I'm working on some web-browser based JS stuff, and looking at the Kindle's USB partition, I can see a folder called .active_content_sandbox

In there, there is are cached Kindle store files, such as index.html, secondaryStore.html, e.t.c.

Most of them are obfuscated, but I can see some code that is related to a custom window.kindle property:

if(!kindle || typeof kindle === 'undefined') {
                    var kindle = window.kindle || top.kindle;
                }
                var host = kindle;
                
                if (host.dev.webkitLog) {
                    host.dev.webkitLog('on');
                }  
                
                var Locale = window.Locale || top.Locale;
                var DateTimeFormat = window.DateTimeFormat || top.DateTimeFormat;
                var NumberFormat = window.NumberFormat || top.NumberFormat;

and also

kindle.dev.loadResource&&(kindle.dev.loadResource(window.frameElement?window.frameElement.id:"externalPage","jquery"),kindle.dev.setSensitivity(!0,1500)),kindle&&(kindle.chrome.setTitleBar("",pageTitle)

However, when I try to observer window.kindle from the browser, it merely shows up as undefined, running the following code:

for (prop in window) {
  log(prop);
}

Shows that it does indeed exist, however, checking its type shows as "undefined" and it appears to be inaccessible


Does anyone know anything about how this works???
Thanks