For Firefox there are actually a couple of rendering add-ons, you don't like any of them?<p>I also write everything in md, but don't render — just styled my neovim for readability. In vim & neovim you can follow links to other local md files, web, etc. The benefits of this are instant navigation within both the folder structure and the document itself.<p>Also using nvim-twilight for dimming out non-focused text blocks.<p>There are rendering plugins as well, I just don't really need them. In my style headings are bold, different color depending on the level, # are set to be barely visible — kinda nicer than html/pdf for me personally.<p>Maybe there are some useful plugins for your TE/IDE?