Switching to a updated browser has several advantages : Security
Updated browsers protect you better against fraud, viruses, trojans, phishing, and other threats

Speed All new generation browsers
n improve the speed
Compatibility
Sites that use new technologies will be better presented
Comfort & richer experience
With new features, extensions and better customization, you have a better experience when browsing the web

Updating is easy, takes a few minutes and is totally free. Outdated browsers are a security threat and are making difficult the advancement of the web because of its limitations and many malfunctions.
´I do not have permission to update my browser´
If you´re on a computer, which is maintained by an administrator and you can not install a new browser, talk to your administrator about it. If you can not change because of browser compatibility issues, try to install a second browser, and keep the old one to ensure compatibility.