Firefox is well worth installing. It is much faster than IE.
No problem with having them both installed, use either one.
If you don't like it just uninstall, there should be no problems.
Huawei P10 review
1995-2015: How technology has changed the world in 20 years
An overview: What leading creative agencies are doing to improve diversity
New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.