A few questions #502

Hi, I installed Heimdall today.
And I have some questions that I have not found an answer.

1. Where is the "logout" button? I did not find him.
2. Where do I change the browser logo - favicon
   And how do I change the title in the browser from Heimdall to something else I want?
3. In Settings> Link opens in, there are 3 options Open in the same tab, Open in this tab and Open in a new tab.
   The Open in a new tab is understandable what it is. But the other two did not really understand what the difference was between them ... I would love a small explanation of what the difference is?
4. What does the email do here?

Thanks
Itay