You may not know why your wordpress site is not fully SSL secured

I am moving all websites to our own private server at Ramcode and working hard to make sure each site is SSL secured using Let’s Encrypt certificates. However, no matter how carefully I changed all image reference source URL from http to httpS, the Firefox browser always displays the warning right in front of https on the browser URL, indicating the page has secured and unsecured contents mixed together. See it for yourself…

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