2002554 - Visuals not matching Figma design for NS_ERROR_NET_EMPTY_RESPONSE

Status: VERIFIED FIXED

(Firefox :: Security, defect)

Description

[Ada C.]

Attachment: Screenshot.png

Found in

• Beta 146.0b8

Affected platforms

• MacOS 15.6.1, Windows 10, Ubuntu 24.04, Windows 11, MacOS 13 ARM

Preconditions

• security.certerrors.felt-privacy-v1 set to "true"

Steps to reproduce

1. In a Text file, insert the Python script and save it as empty_response_server.py:

import socketserver

class EmptyResponseHandler(socketserver.BaseRequestHandler):

def handle(self):

    # Accept connection and then close without sending any data

    print(f"Connection from {self.client_address}, closing immediately without response.")

    self.request.close()

if name == "main": # correct check

HOST, PORT = "localhost", 8000

with socketserver.TCPServer((HOST, PORT), EmptyResponseHandler) as server:

    print(f"Serving on {HOST}:{PORT}")

    server.serve_forever()||

2. Run the file in Terminal using command:

python empty_response_server.py

3. Open Firefox and go to http://localhost:8000

Expected result

• Since security.certerrors.felt-privacy-v1 is set to "true" the new version of the network error page should appear.

Actual result

• Even though security.certerrors.felt-privacy-v1 is set to "true", an older version of the network error page is presented.

Regression range

• Not a regression.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:manuel, could you have a look please?

For more information, please visit BugBot documentation.

Comment 2

[Manuel Bucher [:manuel]]

Currently disabled, but looks like getting enabled for Fx148: Bug 2003587

Comment 3

[Jack Brown]

Attachment: Bug 2002554 - Visuals not matching Figma design for NS_ERROR_NET_EMPTY_RESPONSE - r?niklas

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/9604eb03510b
https://hg.mozilla.org/integration/autoland/rev/460a63fb8945
Visuals not matching Figma design for NS_ERROR_NET_EMPTY_RESPONSE - r=fluent-reviewers,desktop-theme-reviewers,bolsson,Gijs,emilio

Comment 5

[Serban Stanca [:SerbanS]]

https://hg.mozilla.org/mozilla-central/rev/460a63fb8945

Comment 6

[Ada C.]

Verified fixed on Nightly 149.0a1 (20260121163431).