[1] Issue 1854963002: Remove the default backspace event handler. - Code Review ( (2016-05-20 23:41:12 +09:00)) https://codereview.chromium.org/1854963002

[2] Issue 608016 - chromium - Can't navigate back using the backspace key - Monorail ( (2016-05-20 23:41:48 +09:00)) https://bugs.chromium.org/p/chromium/issues/detail?id=608016

[3] 1041377 - Disable Backspace as a shortcut for navigating back in history, 2021-01-10T02:51:54.000Z https://bugzilla.mozilla.org/show_bug.cgi?id=1041377