- Go to https://en.wikipedia.org/wiki/STS-118
- Scroll down to "Mission timeline"
- Click an image to open MMV
- Go back
- You are still at the same position inside the page
- Open the same image again in MMV
- Now click on the image (to open the full size image) or alternatively click on "Description" to navigate to the file description page on Commons
- Go back (your in MMV again)
- Go back
You are now at the top of the page. This is firefox specific and reproducible in the latest versions of it (At least 53.0)