When the user leaves instance’s page which function is

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When the user leaves instance’s page which function is called?

1. NP_Initialize
2. NP_Shutdown
3. NPP_New
4. NPP_Destroy
5. None of these

Correct Option: D

When the user leaves instance’s page or closes its window a plug-in instance is deleted. Then Gecko calls the function NPP_Destroy to inform plug-in that the instance is being deleted. Plug-in API calls and callbacks use main Navigator thread.