Netscape navigator is showing Error
I am now on my uncles home and he have an old computer and it have Netscape browser in it. I use my mobile to take internet in it. When I try to go to youtube it is showing some errors. It says "http://mail.google.com/mail/?ui=2&ik=5a447c2705&view=att&th=124949ddbe447f35&attid=0.1&disp=inline&realattid=f_g1abil30&zw".
I wonder why is this ?
I want to know why is this happening, And its technical details.