The Ultimate Guide: Hosting a Firebase Service Worker on Blogger via Cloudflare (~ Zero-CPU)

The Ultimate Guide: Hosting a Firebase Service Worker on Blogger via Cloudflare (~ Zero-CPU)

Adding progressive web app (PWA) features like background push notifications to a Google Blogger site has historically been an uphill battle. The core issue? Browsers demand that your background communication engine ( firebase-messaging-sw.js ) must live at the absolute root directory of your custom domain (e.g., yourdomain.com/firebase-messaging-sw.js ) to securely manage the site's network scope. Because Blogger is a completely managed platform, it lacks a traditional file directory system. You cannot simply upload a raw JavaScript file to your root path. If you try hosting it on an external CDN or storage bucket, the browser will instantly block it due to strict Service Worker cross-origin security protocols. The Architecture Strategy We bypass this platform limitation using Cloudflare Workers as an edge routing layer. By proxying your domain traffic through Cloudflare, we can intercept the exact path your service worker requires and dynamically inject the code at the edge. Furthermo…