Microsoft's new Chromium-based edge browser is now available – in beta. By default, however, you can only install a small number of Microsoft approved extensions. To install extensions from the Chrome Web Store in the new Edge:
Only for the new Chromium-based Edge
Microsoft is beta testing New Version from Edge, which saves its rendering engine in favor of Chromium, which forms the basis for Google Chrome. Chrome extends battery life and the new Edge gets Chrome extensions. Microsoft hosts some edge-specific extensions, but only about 100 of them. That sounds like plenty, but if you throw away duplicate features and small extensions (like the Microsoft Personal Shopping Assistant), that list will disappear. It's growing, but it's quite small compared to the Chome Web Store.
So, if you're using the new Edge and want more browser extensions, you can install them through the Chrome Web Store. And that's great, because even if an extension exists in both the Edge and Chrome stores, sometimes the Chrome version works better or has more features. For example, we can not get the Grammarly Edge extension to sign in to an account to unlock premium features. However, the Chrome extension installed on Edge works fine.
To install Chrome extensions, just flip a switch and navigate to the online store. However, you should know some warnings from Microsoft: If an extension to log in or sync relies on the Google Account feature, the extension may not work in Edge. If the extension is based on companion software on the PC, the extension may not work even if you have installed the software.
How to Install Chrome Extensions in Edge
Installing Chrome extensions on Edge is a straightforward affair. First, click on the three horizontal dots in the upper right corner of the browser to open the menu.
Then click on "Extensions" in the menu. 
Enable the "Allow extensions from other stores" checkbox in the lower left corner of the extension page shown.
Microsoft will point out that the extensions have not been reviewed online in the Chrome Web Store or elsewhere. Click "Allow" to continue.
Now navigate to the Chrome Web Store and look for an extension that you want to install. All you have to do is click "Add to Chrome".
Click Add Extension in the confirmation dialog just as you like The extension was installed in Chrome.
Keep in mind that extensions you install from the Chrome Web Store have not been tested for the edge browser. There may be errors or other damage. It may be a good idea to install one extension at a time and make sure that you do not encounter any problems before moving to the next extension.