Build Identifier: http://hg.mozilla.org/mozilla-central/rev/53d5e43e23cc Mozilla/5.0 (Windows NT 6.1; WOW64; rv:26.0) Gecko/20100101 Firefox/26.0 ID:20130914030203 This is spun off from Bug 914251 Autoscroll does not work as expected. html, body { width: 100%; height: 100%; overflow-x: hidden; overflow-y: scroll; } breaks autoscroll. Steps To Reproduce: 1. Enable autoscroll from preferences if necessary 2. Open attached sample html 3. Attempt to autoscroll Actual Results: Outer scroll box(html) is not scrolled Expected Results: Outer scroll box(html) should be scrolled when inner scroll box(body) touched the top/bottom. The behavior should be like overflowed textarea in this page.

>The behavior should be like overflowed textarea in this page. This is not true... But in the case of comment#0, I think outer scroll box should be scrolled because last line of the content is cut off.

(In reply to Alice0775 White from comment #1) > But in the case of comment#0, I think outer scroll box should be scrolled > because last line of the content is cut off. Agreed