An adblocker would be first on my list. And second I don't care about cookies extension.
If you are a guest you see the adverts on here
When you sign in like on all sites/forums they disappear
Adding extension support is fine, but then someone has to code those extensions. I'm of the mindset that I'll stick with chrome primarily for now. I use Edge on occasion, but I will wait for it to mature. Yes, it is definitely better than on the original release, but it has a long way to go before it can compete with the browsers that have been around for some time.
Extensions aside, I'll use Edge when it behaves like a browser and not an app.
Heck, might as well use UC Browser or the Google search app!