A sandbox is able to perform this operation through data, software and the background OS. The programs contained in a sandbox are being operated by itself. It helps to get rid of applications on your OS. There must be some setting in Sandboxie that I'm missing.This unique application comes from the product of Microsoft Windows.

The old (default) sandbox updates these files, but also creates a file called aborted-session-ping.tmp

The new sandbox doesn't update any of these files when I close TB. They are updated every time I close TB outside of Sandboxie. There are 3 files that I believe affect the reopening of Thunderbird: viewing changes that I make in the new sandbox are not saved. It will always open the way it was closed when I last opened Thunderbird OUTSIDE of Sandboxie. NOTE: once I open Thunderbird within Sandboxie, it will reopen the 'wrong' way shown in the 2nd image below, even if I open Thunderbird outside of Sandboxie. I posted the 2 images below: the first is the way it should reopen (& does if I don't use Sandboxie) the 2nd image shows what happens if I open Thunderbird within Sandboxie. not maximized), the navigation folder shows all my folders (rather than just the favorites), & the gmail server is selected (rather than the subfolder I was viewing). However, when I open it in Sandboxie, close it, & then reopen Thunderbird, it opens in restore mode (i.e.

It will open it maximized in whatever folder I was viewing when closed & my folder pane will show favorites (when I close it that way). Thunderbird works fine when I open it outside of Sandboxie. I also have an addon called Folder Pane View Switcher (which lets me switch between seeing all my folders or just my favorites). When I close Thunderbird, the next time it opens, it should open to the same folder. I noticed this happening after recently upgrading Windows from 1809 to 1903. Windows Defender Antivirus (not sure of version)

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