Clicking on PowerShell files downloads the file instead

Using either Chrome 36 or Firefox 31 on Windows, on this page (https://bitbucket.org/samuel.lai/stackdump/src/) if I click on any other .ps1 files (PowerShell scripts), the browser will download the file instead of showing it inside Bitbucket's web interface.

Files with other file extensions seem to work fine, e.g. the *.sh files at that same link.

This is a bit annoying, as I have to download the file and opening it up in a local editor to view it for PS1 files, but have a completely different workflow for other files.