Tried to direct browser to local .md file; however, it didn't work; hence, I was unable to edit my local .md file.

Very good ! It is the markdown online editor I want.

Very decent editor.

Integration with Grammarly plugin would be a killer feature.

Works great, except when the "M↓" icon is moved to the top bar (using "Customize" in the hamburger menu) with the File, Edit, View, History, Bookmarks, Tools and Help menus, it's invisible until I hover the mouse there. This is because the top bar is a bit darker than the grey area near the address bar.

It's pretty awesome to be able to export Markdown to HTML!

It's very perfect to write Sina's blog .