I start up Firefox without sandbox settings. It loads the last opened tabs as expected. Then I add Firefox to the sandbox - it does not know the last opened tabs anymore. Desperate I add all my drives to the shared folders so that there should be no restrictions (just for test purposes of course). Now Firefox should have full access to all resources. But there is still the same problem. What did I do wrong?
You need to add the Web Browser Data Group to Do not virtualize access to the specified files/folders.
Also see attached image. The screen are to be read clock wise starting in the upper left corner.
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Thank you for your response.
It does not help to add this folder. It does not even help to add all drives as shared/open.
Since Firefox does not close when using the software Sandboxie anymore too (just closes the window) I switched back to the 2012 version :-TU. Sandboxie works there and so I do not need the sandbox of CIS.