Oh wait, I think that's even worse. This is the case for all google sites, if you use firefox, back button is disabled. Maybe this is to worsen the user experience for Firefox and encourage use of Chrome?
I'm also using Firefox. No addons, running on Ubuntu. I click on the link, read the article, click the "Back" button, and everything works as I expect.
Oh wait, I think that's even worse. This is the case for all google sites, if you use firefox, back button is disabled. Maybe this is to worsen the user experience for Firefox and encourage use of Chrome?