Does not work with Chromium?

I have installed WordPress HTTPS (SSL) 3.3.6 on a WordPress 4.0.1 de-DE, and set it to force SSL connection non-exclusively (i.e. all pages). It works with Firefox and Opera… but not with Chrome/Chromium.

Tested
– Firefox 33.0 (for Ubuntu canonical)
– Opera 12.16 (build 1860 for Linux)
– Chromium Version 39.0.2171.65
on Ubuntu 14.04.

See http://imgur.com/a/4NRIL for screenshots.

https://wordpress.org/plugins/wordpress-https/