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

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

update 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.