This works great! I can combine it with Firefox' often-forgotten "Keyword" feature of bookmarks so that typing note in the URL bar automatically opens this. And

This works great! I can combine it with Firefox' often-forgotten "Keyword" feature of bookmarks so that typing note in the URL bar automatically opens this. And to save a note I just press CTRL+S Microscopic tweak: white font on black background data:text/html, <body contenteditable style="font: 2rem/1.5 monospace;max-width:60rem;margin:0 auto;padding:4rem;color:white;background-color:black;"> EDIT: Another tweak: give the body focus automatically data:text/html, <html><body id='.' contenteditable style="font: 2rem/1.5 monospace;max-width:60rem;margin:0 auto;padding:4rem;color:white;background-color:black;"></body><script type="text/javascript">var div = document.getElementById('.');setTimeout(function() {div.focus();}, 0);</script></html>