This was reported by an editor using Firefox 27.0.1 on a Windows 8.1
When you start using the previous and next tabs to load new images in Media Viewer, it has the effect of breaking your Back button in the browser. Back no longer returns you to the page immediate to opening Media Viewer, but instead cycles through all the old loaded images to return to the previous page. This should be avoided if possible for a better user experience.
Version: unspecified
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=62266
https://bugzilla.wikimedia.org/show_bug.cgi?id=62274