All of that work and my back button is still broken. It also looks like I can slide a script tag into my comment and have it run.
1. Go to https://github.com/k2052/vanilla-hn
2. Click link to live demo at the top
3. Click comments
4. Press back, you'll be back at the main view
5. Press back, you'll still be in the main view, expected: go back to github