1726705 - node.isDefaultNamespace("") behaves differently in firefox compared with chrome and webkit

Status: RESOLVED DUPLICATE of bug 1061578

(Core :: DOM: Core & HTML, defect)

Description

[zyscoder]

User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36

Steps to reproduce:

(1) Open a tab and navigate to URL: https://youradchoices.com/;
(2) Open the Devtools and evaluate the following code:

document.all[2].isDefaultNamespace("");

(3) Firefox would get a "true" result for this code, but Chrome/Webkit get a "false" value.

Actual results:

Firefox would get a "true" result for this code, but Chrome/Webkit get a "false" value.

Expected results:

Behave the same with Chrome and Webkit

Comment 1

[Andrei Purice]

Reproduced on the latest versions of Firefox Nightly 93.0a1 (2021-08-22), beta 92.0b7 and release 91.0.1 on Ubuntu 18.04.
Setting up flags and a severity of S3.

Setting a component for this issue in order to get the dev team involved.
If you feel it's an incorrect one please feel free to change it to a more appropriate one.

Not a recent regression as this issue can be traced back to at least Firefox 70.0.

Comment 2

[Julian Descottes [:jdescottes]]

Probably a duplicate of Bug 1061578?