Comment by oneeyedpigeon

Right now, I would take a button to go to the previous revision of a file, showing the full file with the diff underneath. That way I could very easily 'browse' through the history of a file to find out things like when a particular change got introduced or just get a feel for its history. Why on earth don't github/bitbucket provide this? Surely it's a reasonable and common requirement? Or is there something inherent to git that makes it too awkward?