Hi:
We have one option in the Canonicalizer inside the Miscellaneous module to make all requests http:// or https:// depending on how the user accessed the site
However, the code by default for the output of the OG meta prefix is in in http:// but also it’s commented out, so it’s not affecting your page being secure or not (if that is the concern).
Code below:
<!DOCTYPE html>
<!--[if lt IE 7]> <html lang="en-US" prefix="og: http://ogp.me/ns# fb: http://ogp.me/ns/fb#" class="no-js lt-ie9 lt-ie8 lt-ie7"> <![endif]-->
<!--[if IE 7]> <html lang="en-US" prefix="og: http://ogp.me/ns# fb: http://ogp.me/ns/fb#" class="no-js lt-ie9 lt-ie8"> <![endif]-->
<!--[if IE 8]> <html lang="en-US" prefix="og: http://ogp.me/ns# fb: http://ogp.me/ns/fb#" class="no-js lt-ie9"> <![endif]-->
<!--[if gt IE 8]><!--> <html lang="en-US" prefix="og: http://ogp.me/ns# fb: http://ogp.me/ns/fb#" class="no-js"> <!--<![endif]-->
<head>
Let me know if this answers what you have in mind.
Best,
Jeffrey