Pinterest has the honor of being the first official Edge extension in the Windows Store.
The Pin it button lets you easily save creative ideas from around the web. Click the Pinterest button next time you find something interesting that you want to save for later. Collect recipes from your favorite food blogs, articles you want to read later, ideas for your home and more. Links are saved as visual bookmarks on the Pinterest website, which are much easier to recognize and organize than bookmarks.
The extension can be downloaded by both Windows 10 desktops on the latest Redstone builds and Windows 10 Mobile handsets, but on mobile there does not appear to be any user interface to access the functionality yet.
You can download the extension from the Windows Store here.