mozilla/butter — pull request #857 by mjschranz (2012-08-23 19:47:23+00:00)
Title: [#1905] Scrollbars only show now when needed and a scroll event takes place

https://webmademovies.lighthouseapp.com/projects/65733/tickets/1905-allow-editor-scrollbars-to-be-only-visible-when-needed