Unfortunately, some problems remain with both the Free and Pro versions, it will not be possible to set a Time Out higher than 100s, so many massive operations will go into error 524 . So if we need to go beyond this limit, we need an Enterprise subscription (very expensive), or we need a subdomain for the backend (eg admin.yourdomain.it) set in the DNS not in proxy management, or with the gray cloud. A configuration that has become very complex with PrestaShop 1.7, but a useful solution to avoid this type of problem. By using a different subdomain, there is also a need to remove the cookie IP verification, which is an important security measure.
One of the interesting features available in the PRO version is the CDN, with relative image optimization, the strengths of this solution beyond the conversion to WebP, is the resizing of the images based on the device request; in this way, for example, mobile and desktop devices will have optimized images. In reality it is also possible to do it on the server side with the use of the Google Page Speed module, but with a high cost in terms of TTFB, therefore not recommended. With the use of the CDN there will be no worsening of the load and in addition you will have all the advantages deriving from a network for distributed content sharing, i.e. the images will be provided by servers closer to the user, very useful if our eccommerce for example, it also operates in America and ASIA.
Operation which, however, given the technical difficulty is to be carried out only if you are using a PRO version of CloudFlare, if our need is to protect our ecommerce from a sporadic attack we can activate the proxy only for the necessary period and deactivate it when we need to carry out massive operations and use the FREE version of CloudFlare.