Back in February of this year the total number of extensions available in the Windows Store for Microsoft Edge was at a total of 23 options.

I talked about the very slow trickle of extensions coming in for Microsoft Edge and the fact the submission process for these extensions was still a closed process with no public path for extension developers to submit their own work. Each and every extension that is now in the Windows Store has been the result of a partnership and work between Microsoft and the extension developer.

While this ensures a fairly good quality experience with the extensions that are in the Windows Store, it limits many users options to make Edge their default browser because key extensions are not available for Microsoft's Windows 10 browser.

It feels a lot like the lack of apps in the Windows Store for the Windows 10 ecosystem but there are now over 500 million monthly active users of Windows 10 and if you want more of them using Edge as their default browser then the extension options need to grow much faster.

However, the addition of 12 extensions over a little more than three months is certainly the fastest period of growth for them on Windows 10 so maybe, just maybe, we are at the beginning of that cycle where this all opens up.

So what are the new extensions that have been added over the last three months?

Let's take a look:

Built With Extension for Microsoft Edge

Find out what the website you are visiting is built with using this extension. The BuiltWith Edge Extension lets you find out what a website is built with by a simple click on the BuiltWith icon! BuiltWith is a web site profiler tool. Upon looking up a page, BuiltWith returns all the technologies it can find on the page.

Download: BuiltWith

ClassLink OneClick Microsoft Edge Extension

ClassLink gives students and teachers OneClick access to web apps and files. With ClassLink, there is no time wasted searching for urls and trying to remember usernames and passwords. The ClassLink OneClick library includes single sign-on to over 5,000 web apps. Ideal for 1to1 and BYOD classrooms, ClassLink OneClick gives students and teachers what they want… instant access to their web apps and files without having to remember long website urls, usernames or passwords.

Download: ClassLink OneClick

Norton Identity Safe Microsoft Edge Extension

Norton Identity Safe is a cloud-based password manager that makes it easy to log in to your favorite sites safely. With this extension, you can easily access your Identity Safe Vault from your Microsoft Edge browser.

Download: Norton Identity Safe

Zoom Microsoft Edge Extension

Zoom in or out on web content using the zoom button for more comfortable reading. It helps you to zoom easy in and out a web page. Thanks to the slider and the zoom buttons. It's the number one and best magnifying browser extension to customize the zoom value of that web page.

Download: Zoom for Microsoft Edge

Keeper for Microsoft Edge Extension

Keeper is the world's #1 most downloaded password keeper and secure digital vault for protecting and managing your passwords and other secret information. Millions of people use Keeper to protect their most sensitive and private info.

Download: Keeper for Microsoft Edge

Nimble Contacts Extension for Microsoft Edge

The Nimble Smart Contacts App enables you to view social profiles, streams and signals related to that contact from a single screen. The app automatically pulls and displays your complete communication history of social messages, emails, notes, and events for every contact in Nimble.

Download: Nimble Contacts

Autofill for Microsoft Edge Extension

Autofill for Microsoft Edge - Powered by Fillr, the world's most intelligent autofill. It will change the way you shop and fill forms online forever.

Download: Autofill for Microsoft Edge

BrowserStack Microsoft Edge Extension

BrowserStack lets you test your websites straight from your browser on 1100+ real mobile and desktop browsers.

Download: BrowserStack

JSON Formatter Microsoft Edge Extension

Makes JSON easy to read. Open source.

Download: JSON Formatter for Edge

CR Unblocker Microsoft Edge Extension

The CR-Unblocker is an extension to unblock region-locked content on Crunchyroll. It works by getting an American session ID and setting that as your current cookie and thus Crunchyroll will think that you are located in the US and give you access to all US-only anime.

Download: CR-Unblocker

PrintFriendly and PDF Microsoft Edge Extension

Print Friendly removes ads, navigation and junk before your print. Pages are optimized for the ultimate print reading experience.

Download: PrintFriendly and PDF

uBlock Origin Microsoft Edge Extension

An efficient blocker: easy on memory and CPU footprint, and yet can load and enforce thousands more filters than other popular blockers out there.

Note: This extension has been in preview for sometime and was only accessible through a direct link. It is now available in the Windows Store publicly.

Download: uBlock Origin

You can see the entire list of extensions for Microsoft Edge in the Windows Store.

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But, wait...there's probably more so be sure to follow me on Twitter and Google+.