As of February 7, 2013
| Testcase | Firefox 21 | IE 10 | Opera 12.12 | Chrome 26 (1) |
|---|---|---|---|---|
| test_attributes_exist | pass | pass | pass | fail |
| test_default_view | pass | pass | pass | fail |
| test_child_document | pass | pass | pass | fail |
| test_minimize | pass | pass | fail | fail |
| test_read_only | pass | pass | pass | fail |
| test_tab_state_change | pass | pass | pass | fail |
| idlharness | 5/7 (2) | pass | fail | fail |
(1) Chrome doesn't support the unprefixed version yet
(2) Firefox didn't update the Document interface prototype yet
Note: Safari wasn't tested.