TYPO3 9 LTS: Browser blocks mixed content: proposal how to solve it

[chrisprog20]

TYPO3: 9.5.8
powermail: 7.3.1
powermail_cond: 7.0.0

Hello,

I just discovered that powermail_cond does not work in browsers blocking mixed content on a TYPO3 9 LTS installation : for example in Firefox 68. Here my situation:

I use a powermail form together with a simple powermail_cond condition on a https site.
Investigating the console tab revealed me that the generated absolute ajax url from powermail_cond uses http.

Investigating further I could find the following solution:

If you replace in the typolink declaration of the page property 3132 the value for "forceAbsoluteUrl" by 0
the generated ajax url is relative and hence called via https and the condition works.

Side note: This change is not necessary in TYPO3 8 LTS as there the generated ajax url contains https.
I think the different behaviour of url generation has to do with the site configuration introduced in TYPO3 9.

Cheers
Christian