This is the .htaccess file compatible with CPanel with all modifications required on GTMetrix. If you have acquired a CDN (Content Delivery Network) such as Cloudflare, a security cookie is generated by Cloudflare and can not be blocked through your domain's .htaccess.
All about coding methods to obtain the highest possible score on Blogger with GTMetrix (Pagespeed and YSlow).
The primary blog of interest for this experiment and optimization is (located here).
Leave comments or questions about optimizing Blogger and GTMetrix. I typically check messages daily.