Describe the bug
When viewing a markdown file that has content-type: text/markdown header, the text is not render as markdown by the extension.

To Reproduce
Steps to reproduce the behavior:

1. Go to a URI that doesn't have .md in the URL but does have content-type: text/markdown header

Expected behavior
The response text should be rendered by the extension

Desktop:

• OS: macOs
• Browser: Arc
• Version: 1.142.1 (78710)

Additional context
This specifically happens for Asana attachments that are markdown files.