What is this? Is it necessary No
Is it desirable? Your choice, it's the new version of IE, as it's only RC1 I would advise to leave it alone, although many here have been using the beta version without problems.
Xiaomi Mi Mix 2 review
What went wrong at the Designs of the Year 2017
iPhone X news: Release date, price, new features & specs
Comment créer, modifier et réinitialiser un compte Apple ?