Using clear private data on exit

When you "re-open" the browser, do you get the Firefox Portable splash screen? If not (and you don't have the splash screen disabled), it seems that firefox.exe hasn't really gone away when the Clear Private Data window disappears. In that case, running FFP again will cause it to attach to the still-running firefox.exe instead of launching another standalone copy. That could explain the window reappearing (the attaching process "woke up" the sleeping browser). It probably was busily deleting stuff but simply didn't finish before you woke it up.

You can pretty easily verify if something like this is happening:

1. Run Firefox Portable.
2. Press Ctrl+Alt+Del or right-click on an empty space in the task bar to run Task Manager.
3. In Task Manager, click on the Processes tab and on the Image Name column header to sort the processes in alphabetical order.
4. Find and click firefox.exe, moving the highlight bar to that line.
5. Exit the browser as usual.

The highlighted firefox.exe line will disappear from Task Manager when the browser actually exits (followed shortly thereafter by FirefoxPortable.exe). If you launch a new firefox.exe, it won't be highlighted (the only process to get highlighted is the specific one you previously clicked). As a matter of fact, if you launch a new firefox.exe while the old one still exists, the new one will appear in the list just long enough to hand off its opening request to the existing one.

If you're unconvinced from the simple highlighting method, you can turn on the PID (Process Identifier) column — PIDs are guaranteed unique over a much longer period of time than this test requires.

Please post results!  -hea

P.S. You can also turn off the Ask me before clearing private data option to remove the user interface anomaly.