Hey good call on the padlock issue I hadn't even thought of that. However, I don't it should be visible only when switching tabs. I think instead it should be a

Hey good call on the padlock issue I hadn't even thought of that. However, I don't it should be visible only when switching tabs. I think instead it should be added to the tab itself that way it's always visible. However, that means presenting some kind of divider or something on the tab itself so that some one can't fake it with a favicon. Perhaps by coloring the tab and adding the padlock at the right most of the tab. This way it will be less likely to confuse it with the favicon.