here is the list of Supported Browsers

Internet Explorer 11 and older

Android browser 4.4 and older

Ethernet Explorer

Safari 5 and older

Netscape Navigator 8.3.1

Get Ethernet Explorer.

Get Safari For Windows.

Get Netscape Navigator.

How do i actually get theese browsers without administrator?

Ethernet Explorer can be ran without admin, and it supports windows 8 or higher! 7 might work but it hasnt been tested yet.