Here is a simple trick to turn your browser into iA writer like editor. Simply put this code in your address bar and press enter. (supports modern browsers). You obviously can bookmark the tab after putting that code for future use. You can also save the file as html using chrome 'Save Page as'.
data:text/html, <body contenteditable style="background-color:#f5f5f5;font-size:2rem;font-family: monospace;line-height:1.4;max-width:60rem;margin:0 auto;padding:4rem;">
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