Incorrect short link on Firefox German share page

[wen-2018]

Description

On the Firefox German share page https://www.mozilla.org/de/firefox/share/, the short link in the green section should link to https://www.mozilla.org/de/firefox/challenge-the-default/?utm_medium=referral&utm_source=www.mozilla.org-ctd-lp&utm_campaign=ctd-fr-dma&utm_content=refer-a-friend

Instead, it is directed to https://www.mozilla.org/de/firefox/?utm_medium=referral&utm_source=www.mozilla.org-ctd-lp&utm_campaign=ctd-de-dma&utm_content=refer-a-friend

Steps to reproduce

1. Go to https://www.mozilla.org/de/firefox/share/
2. Click on mzl.la/ctd-de in the green section

Expected result

It should go to https://www.mozilla.org/de/firefox/challenge-the-default/?utm_medium=referral&utm_source=www.mozilla.org-ctd-lp&utm_campaign=ctd-fr-dma&utm_content=refer-a-friend

Actual result

It will go to https://www.mozilla.org/de/firefox/challenge-the-default/?utm_medium=referral&utm_source=www.mozilla.org-ctd-lp&utm_campaign=ctd-fr-dma&utm_content=refer-a-friend

Environment

What browser and operating system are you using?

[janbrasna]

(Nit: STR "Actual result" contains the same link, while in reality it's the one from the original description above, so it may need editing to help the Expected/Actual results make sense.)

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Some historic context in #14957 that's closed in favor of this outstanding issue.