One of the coolest features of Jetpack is Photon, a free CDN of sorts that hosts your site’s images from the WordPress.com servers. While there’s lots of debate on whether Photon can be a help or a hindrance from a speed and SEO perspective, if you want to use it over an HTTPS connection you’re currently out of luck.
The solution though is quite simple. By adding add_filter( 'jetpack_photon_reject_https', '__return_false' ); to your theme’s functions.php file, Jetpack will now download and feed all of your images over a secure connection. This should help in clearing out any mixed content errors at the very least.
Unfortunately, you may quickly discover that this is a very inconvenient method of doing things as you may need to redo the tweak every time your theme receives an update. Instead, we’ve created a very tiny plugin to accomplish this.
- Download the plugin
- On your site, go to plugins -> add new
- Select “Upload Plugin” towards the top, select the file and hit “Install Now”
- Activate the plugin
That’s it. Now your site can use Jetpack Photon over HTTPS and it’s theme update-proof.