Rated 2 out of 5 stars

Sadly, in many cases, it screws up the formatting completely even for content that is otherwise perfectly formatted on the demo page. Again and again, I write up loooong messages with lots of code and structural elements, only to watch it go to heck after I press the button.

This review is for a previous version of the add-on (2.12.0). 

Let's figure this out...
- Which client are you using (Firefox or Thunderbird)?

- What version of the client are you using?

- Have you restarted your client since installing?

- Does the Markdown Here options page work for you?