AdBlock Plus had confirmed in December that they will bring an extension to Microsoft’s Edge browser once Extensions are enabled for the browser. Microsoft’s Edge browser is not adopted by users mainly because of extension support which is a must for many.
Therefore, AdBlock users on chrome would use the Edge browser only when Adblock extension is supported in it.

Good news is that AdBlock developers are working on Extensions for Edge browser. In the last Windows 10 Insider preview build, Microsoft introduced the support for extensions in the browser. Here’s the tweet confirmation:

Microsoft had already confirmed that they are working on a tool for porting Chrome extensions on Edge. Microsoft Edge browser extensions are also expected to come on Windows 10 Mobile. But right now their priority is to bring more and more extensions on edge.