I went looking and it was indeed Chrome that could do it. See screenshot from 2009 here: https://superuser.com/a/42499 https://superuser.com/a/42499 Google rem

I went looking and it was indeed Chrome that could do it. See screenshot from 2009 here: https://superuser.com/a/42499 https://superuser.com/a/42499 Google removed the feature intentionally in 2013: https://bugs.chromium.org/p/chromium/issues/detail?id=297648 https://bugs.chromium.org/p/chromium/issues/detail?id=297648 Apparently Opera supported it too at the time, and from the comments Safari as well. Performance reasons seem to have killed it. I'd think that after 10 years now any modern computer would be able to handle it.