Passing on what I've been told: the tests on Firefox worked fine when we were testing it. Apparently, it's not supposed to hit the correct problem immediately and stand there (like happens in Chrome) - the page may move while it's being loaded and may end up in a weird position, but once all the images have been loaded (and FF stops showing "Waiting for..." in the bottom left corner) it should scroll automatically to the correct post.

Is this not happening? The back button should only require one click too now