very easy to use.
HOW TO USE BROWSER AS TEXT EDITOR:
Step 1) First of all, Open your any browser firefox or chrome.
Step 2) Second, Type in adress bar data:text/html, <html contenteditable>
Step 3) Now hit Enter.
Step 4) Now your browser is turned into text editor.
Step 5) Now you add or or lines like notpad or wordpad etc.
Step 6) I advise you to bookmark this link.