Update preview.md (#689)

Author: shell1

docs/workflow/testing/preview.md

@@ -16,6 +16,18 @@ These steps only apply to Firefox Desktop Version 90+. You can find [instruction
 
 ![Launch to Preview Button](/img/preview/preview-button.png)
 
+### Self-Testing with Nimbus Dev Tools Add-on
+If you aren't a developer, don't let the "Dev Tools" or add-on scare you away.  This is the easier path!  
+
+Here is a 65 second video on (how to install Nimbus dev tools)[https://mozilla.hosted.panopto.com/Panopto/Pages/Viewer.aspx?id=b7b2d02b-79ba-43a0-a708-b2a60107f0bf].  Watching the video takes half the time to getting Nimbus Dev Tools installed.  Here is the (link to docs on how to use Nimbus Dev Tools)[https://experimenter.info/nimbus-devtools-guide#installation].  The very first link on that page is to the (Nimbus DevTools GitHub repository)[https://github.com/mozilla-extensions/nimbus-devtools/releases], where you can find the one click XPI file install.
+
+Here is a 5 minute video on (using Nimbus Dev Tools to test a simple experiment)[https://mozilla.hosted.panopto.com/Panopto/Pages/Viewer.aspx?id=98d797c3-35e2-413a-b68d-b2a5018b814e].  Watching this will show you how to verify simple experiments.  
+
+### How do I know if I have a simple experiment
+There is a Miro flow that can (help determine if you have a good test case here)[https://miro.com/app/board/uXjVK_27t2o=/?share_link_id=702720260336].  Reach out in #ask-experimenter if you are unsure and someone can help you determine the complexity. 
+
+### Self-Testing without Nimbus Dev Tools
+
 2. Scroll down to the **Preview Url** section of the page. Select the branch you want and copy the `about:studies` URL.
 
 3. Open `about:config` in **Firefox Desktop v90+** and set `nimbus.debug` to `true`. Paste the URL you copied above in your browser.