click2load.html fails to load CNAME-3p frames after click on tagesschau.de

[rusty-snake]

Prerequisites

• I verified that this is not a filter issue
  • Filter issues MUST be reported at filter issue tracker
• This is not a support issue or a question
  • Support issues and questions are handled at /r/uBlockOrigin
• I performed a cursory search of the issue tracker to avoid opening a duplicate issue
  • Your issue may already be reported.
• I tried to reproduce the issue when...
  • uBlock Origin is the only extension
  • uBlock Origin with default lists/settings
  • using a new, unmodified browser profile
• I am running the latest version of uBlock Origin
• I checked the documentation to understand that the issue I report is not a normal behavior

Description

click2load.html (via *$3p,frame,redirect=click2load.html) fails to load frames (3p because of CNAME) after clicking on it at tagesschau.de.

A specific URL where the issue occurs

https://www.tagesschau.de/sendung/tagesschau/

Steps to Reproduce

1. New clean firefox profile
2. Install uB from AMO
3. Add *$3p,frame,redirect=click2load.html to "My filters"
4. Open https://www.tagesschau.de/sendung/tagesschau/ (or any other video on tagesschau.de)
5. Click
6. See cert error: SSL_ERROR_BAD_CERT_DOMAIN

cert error

Did Not Connect: Potential Security Issue

Firefox detected a potential security threat and did not continue to e8178.e6.akamaiedge.net because this website requires a secure connection.

What can you do about it?

The issue is most likely with the website, and there is nothing you can do to resolve it. You can notify the website’s administrator about the problem.

Websites prove their identity via certificates. Firefox does not trust this site because it uses a certificate that is not valid for e8178.e6.akamaiedge.net. The certificate is only valid for the following names: www.wahl.tagesschau.de, www.tagesschau24.de, www.tagesschau.de, www.blog.tagesschau.de, wetterstationen.tagesschau.de, wetter.tagesschau.de, wahlarchiv.tagesschau.de, wahl.tagesschau.de, wahl-o-mat.tagesschau.de, umfrage.tagesschau.de, tools.tagesschau.de, todo.tagesschau.de, tagesschau.de, stat.tagesschau.de, spiel.tagesschau.de, service.tagesschau.de, relaunch.tagesschau.de, rbb24.wahl.tagesschau.de, qa.tagesschau.de, programm.tagesschau24.de, prodforum.tagesschau.de, miss.tagesschau.de, meta.tagesschau.de, media.tagesschau.de, matrix.tagesschau.de, live.tagesschau.de, korrespondenten.tagesschau.de, karten.tagesschau.de, intern.tagesschau.de, fbia.tagesschau.de, faktenfinder.tagesschau.de, download.media.tagesschau.de, chat.tagesschau.de, blog.tagesschau.de, beta.tagesschau.de, atlas.tagesschau.de, admin.tagesschau.de
 
Error code: SSL_ERROR_BAD_CERT_DOMAIN

Expected behavior:

Frame loads normal as when uB is disabled/uninstalled.

Actual behavior:

Frame fails to load with TLS error.

Your environment

• uBlock Origin version: 1.32.4
• Browser Name and version: Mozilla Firefox for Fedora 84.0.2
• Operating System and version: Fedora 32