A lot of websites rely on document.all being available and it would be good to have support for it in the same way Mozilla does.
Created attachment 5341 [details] Add undetectable document.all Note that the test case only tests that document.all is undetectable; it doesn't test that the collection works as expected
Looks great, r=me.
*** Bug 4761 has been marked as a duplicate of this bug. ***
*** Bug 6076 has been marked as a duplicate of this bug. ***
*** Bug 6077 has been marked as a duplicate of this bug. ***