Do you write a blog that’s still serving its pages to your visitors’ web browsers in a non-secure (i.e. unencrypted) state?
If you’re not sure, it’s very easy to find out. Simply visit your blog with any web browser and look that the URL in the address bar.
If the URL starts with http:// instead of https:// that means your blog is not being served to your visitors’ browsers in encrypted format.
If that turns out to be the case, your blog’s traffic is likely to drop to pretty close to zero after Mozilla releases the Firefox 70 update in October.