Unfortunately, FastPixel doesn’t work in localhost environments because our plugin is not a simple cache plugin that stores everything locally. FastPixel is a cloud based website accelerator, meaning the pages need to be publicly accessible by our optimization cloud for all your pages and posts to be optimized and cached.
Does FastPixel work with password protected websites? #
By default, FastPixel will not work with password-protected websites unless they are publicly accessible, or our IPs are whitelisted in the .htaccess file or in the plugin used for password protection.
Our IPs can be found in this article.