Not quite a full blog post, but a useful tidbit nonetheless.

Open up developer view (ctrl-I, usually) and paste this into your JavaScript console to untruncate long filenames on GitHub’s tree view.

var targets = document.getElementsByClassName("css-truncate");
while (targets.length)
    targets[0].className = targets[0].className.replace(/\bcss-truncate\b/g, "");

Adapted from here.