Is it possible to have a Vue.js application running on Firebase hosting while using Webflow for marketing campaigns, homepage, and blog, all under the same domain for SEO purposes?

Yes, it's possible to use a Vue.js app on Firebase Hosting alongside a Webflow-managed homepage, blog, and marketing pages under the same domain. This setup allows you to maximize SEO benefits while keeping content and app infrastructure separated.

Here's how you can architect this:

1. Use Firebase Hosting “Rewrites” and “Redirects”

• Firebase Hosting supports custom routing via the firebase.json configuration file.
• Use rewrites to point certain paths (like /app/**) to your Vue.js app.
• Use redirects to reroute specific paths to external URLs, such as Webflow-hosted pages.

2. Host Webflow Content on a Subdomain or Use Proxy Paths

You have two main options for integrating Webflow with Firebase Hosting:

• Option A: Use a subdomain (e.g., www.yourdomain.com for Webflow)  
• Point www.yourdomain.com to Webflow via its A records (75.2.70.75, 99.83.190.102) and CNAME for proxy-ssl.webflow.com.
• Serve your Vue app on a subpath like yourdomain.com/app via Firebase Hosting root (yourdomain.com), while Webflow controls www.yourdomain.com.
• Set a canonical domain for SEO consistency.

• Option B: Use Firebase Rewrites to Proxy Webflow Pages  
• Host your Vue app at yourdomain.com.
• Use Firebase rewrites to proxy paths like /blog, /pricing, or / (homepage) directly to your Webflow-hosted URLs.
• This involves setting firebase.json to rewrite those paths to Webflow’s external URLs, maintaining the same domain in appearance for SEO.

  Example rule in firebase.json:

• { "source": "/blog/**", "destination": "https://webflow-site.webflow.io/blog" }

  ⚠️ Note: Proxying external URLs via Firebase Hosting isn't supported natively unless you use a Cloud Function or a proxy server, which adds complexity. In that case, Option A is preferred for simplicity and reliability.

3. Use Subdomains + Canonical Tags for SEO

• Webflow can manage www.yourdomain.com and include canonical tags pointing to yourdomain.com, or vice versa.
• Redirect yourdomain.com to www.yourdomain.com (or the opposite) to unify your domain and avoid SEO penalties for duplicate content.

4. DNS Configuration

• Point www.domain.com to Webflow’s IPs:  

  (a) 75.2.70.75, (b) 99.83.190.102

• Point domain.com to Firebase Hosting’s IPs, or redirect it to www.domain.com depending on the main hosting point.
• Alternatively, use Cloudflare or another DNS provider to manage root-level redirects and domain resolution.

Summary

You can host your Vue.js app on Firebase Hosting and your marketing site, homepage, and blog on Webflow, all under the same domain by using subdomains (recommended) or advanced routing/proxying with Firebase. For SEO, ensure consistent URLs with canonical tags and redirects to unify domain variants.