Are you serious?
The best /useful things for you are PDFs and SSO?
Both of these features are not what makes a web browser super duper.
PDF viewing is available in all major browsers.
<rant> SSO works in all web browsers - unless you’re using Windows XP as your enterprise cloud server running java and oracle and your asp.net web app requires a microsoft browser running in internet explorer legacy mode. </rant>
I stated two things I like about it over it's competitors, I didn't brand them as the best or most important features on offer.
I specifically stated PDF editing, not just viewing PDF files.
SSO works better on Edge in a work environment, mainly as it connects to the Windows profile. This means that I do not need to make changes to additional browsers or have end users struggling to sign in to various applications. Specifically with Edge, I can simply provide each user profile a folder with shortcuts to the likes of email quarantine, support, Outlook etcetera and they will either see their account listed or only need to enter their email address.
Coupled with appropriate training, this has cut down on users signing into Microsoft login pages that have been designed to look like the legitimate organisation using logo's and other branding. When in doubt, the users can visit the shortcut provided to them.