As they clearly state in their website they mention that
What does Private Browsing not save?
- Visited pages: No pages will be added to the list of sites in the History menu, the Library window's history list, or the Awesome Bar address list.
- Cached Web Content and Offline Web Content and User Data: No temporary Internet files (cached files) or files that websites save for offline use will be saved.
Considering this Scenario
If I open a tab in incognito Mode as per below screenshot.
After I close the tab It gives me an option to Undo Close Tab and If I click on it,This restores the tab which I closed.!
So Does this mean that this statement is untrue? Cached Web Content and Offline Web Content and User Data: No temporary Internet files (cached files) or files that websites save for offline use will be saved
Further research regarding this
I opened the about:config
from Firefox and I filtered browser.sessionstore
.and I'm setting the following preferences as follows,and now closed tab will no longer will be able to perform undo
- browser.sessionstore.max_tabs_undo;0
- browser.sessionstore.max_windows_undo;0
According to Firefox
The saved session data is also cleared upon receiving the "browser:purge-session-history" notification.
The data is stored on disk as a serialized javascript data structure (though it's possible that it will be converted to JSON once that becomes natively supported by Gecko/Spidermonkey)