If you try to loging multiple accounts of a particular website with two different identities, you may not be successful. This is because, IE8 by default, shares the same “session cookies” among all its tabs and windows.

To get around this, there is this IE8 option switch -nomerge.

This starts a new browser window in a new, unique session. Do note that even after using the -nomerge switch, you still have to open a new IE 8 windows and not just a new tab.

To start Internet Explorer 8 in this mode, type iexplore.exe -nomerge in the Start search box, and hit Enter.

Alternatively, right-click one of the IE8 icons > Properties > Shortcut tab and in  the Target box add at the end : append -nomerge. Apply > OK.

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