Status of proposed Firefox XSS filter in bug 528661?

Andreas Vikne <[email protected]> Wed, 28 Feb 2018 17:55:18 +0100

Newsgroups	gmane.comp.mozilla.security
Message-ID	<CAFdzkVyuG4=rBamXpKDKkLqCBagae=q8SEYKaT7+xSztJ8=-cg@mail.gmail.com>

Hello,

What is the current status of the proposed XSS filter for Firefox as
described in this bug report?
https://bugzilla.mozilla.org/show_bug.cgi?id=528661

I have found some more info regrading this filter:
https://wiki.mozilla.org/Security/Features/XSS_Filter
https://wiki.mozilla.org/Security/Reviews/xssfilter

I am interested in a working implementation of a XSS filter for Firefox
based on the same techniques described in these links. I do not find any
updates since 2012 about this topic, is this something that is completely
abandoned?
I understand that an XSS filter is not a prioritized feature, but is this
the only reason why there is no updates?

Regards, Andreas