You can build a cookie-proxy by creating a Flash application and use Shared Objects (SO = Flash cookies) to store data.
Any Browsers with Flash installed could retrieve the informations stored in the SO.
But, it's an ugly workaround.
Just don't share cookies... and find another way to build your website/app.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…