Firefox or Chrome on Windows.
I found a way to allow it with a browser extension called "Ignore X-Frame-Options. I also found that I could hide a column to give more space for reading/editing with a CSS tweak using the "Stylus" extension.
Not ideal solution, but it works.
Has anyone had luck embedding an Evernote "widget" or "iframe" into a browser dashboard?
I'd like to be able to view, add, and edit notes from a window on a custom browser home page.