Custom domain configuration in Firebase - Step-by-Step Execution

Process Flow - Custom domain configuration

Start: Firebase Hosting Setup

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Add Custom Domain in Firebase Console

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Firebase Provides DNS Records

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Update Domain DNS Settings

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Firebase Verifies Domain Ownership

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SSL Certificate Provisioned

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Custom Domain Active and Serving Content

This flow shows how to connect your own website address to Firebase Hosting by adding the domain, updating DNS, verifying ownership, and enabling secure access.

Execution Sample

Firebase

firebase hosting:sites:create my-site
firebase hosting:channel:deploy live
# Add custom domain via Firebase console
# Update DNS records as instructed
# Wait for verification and SSL provisioning

Commands and steps to create a hosting site, deploy content, add a custom domain, update DNS, and activate the domain.

Process Table

Step	Action	Firebase Response	User Action	Result
1	Create Hosting Site	Site 'my-site' created	Run create command	Hosting site ready
2	Deploy Content	Channel 'live' deployed	Deploy app files	Content available on default URL
3	Add Custom Domain	Domain 'example.com' added	Add domain in console	Domain pending verification
4	Provide DNS Records	DNS records shown	Copy DNS records	Records ready to update
5	Update DNS Settings	Waiting for DNS propagation	Update domain registrar DNS	DNS changes propagating
6	Verify Domain Ownership	Domain verified	Wait for Firebase verification	Ownership confirmed
7	Provision SSL Certificate	SSL certificate issued	Automatic	Secure HTTPS enabled
8	Activate Custom Domain	Domain active	Automatic	Site serves on custom domain
9	Exit	Process complete	-	Custom domain fully configured

💡 Custom domain is active and serving content securely after verification and SSL provisioning.

Status Tracker

Variable	Start	After Step 3	After Step 6	After Step 7	Final
Hosting Site	None	Created 'my-site'	Created 'my-site'	Created 'my-site'	Created 'my-site'
Custom Domain Status	None	Added, pending verification	Verified	Verified	Active
DNS Records	None	Provided	Updated at registrar	Updated at registrar	Updated at registrar
SSL Certificate	None	None	None	Issued	Issued

Key Moments - 3 Insights

Why does the custom domain show as 'pending verification' after adding it?

Because Firebase waits for you to update your domain's DNS records and then verifies ownership (see execution_table step 3 and 6). Until verification completes, the domain is not active.

What happens if DNS records are not updated correctly?

Firebase cannot verify domain ownership, so SSL won't be issued and the domain won't become active (see execution_table step 5 and 6). Correct DNS updates are essential.

Is SSL certificate setup manual or automatic?

Firebase automatically provisions the SSL certificate after domain verification (see execution_table step 7). You do not need to manage SSL yourself.

Visual Quiz - 3 Questions

Look at the execution table, at which step does Firebase verify domain ownership?

A Step 6

B Step 7

C Step 4

D Step 5

💡 Hint

Check the 'Firebase Response' column for 'Domain verified' in the execution_table.

According to the variable tracker, what is the status of the SSL certificate after step 6?

A Issued

B None

C Pending

D Expired

💡 Hint

Look at the 'SSL Certificate' row under 'After Step 6' in the variable_tracker.

If DNS records are not updated at the registrar, what will happen to the custom domain status?

A It will become active immediately

B It will be removed automatically

C It will remain pending verification

D SSL will be issued anyway

💡 Hint

Refer to key_moments about DNS updates and execution_table steps 5 and 6.

Concept Snapshot

Custom domain setup in Firebase Hosting:
1. Create hosting site and deploy content.
2. Add your domain in Firebase console.
3. Update DNS records at your domain registrar.
4. Firebase verifies ownership and issues SSL.
5. Domain becomes active and serves content securely.

Full Transcript

This visual execution shows how to configure a custom domain in Firebase Hosting. First, you create a hosting site and deploy your app. Then, you add your custom domain in the Firebase console. Firebase provides DNS records that you must add to your domain registrar. After DNS propagation, Firebase verifies domain ownership. Once verified, Firebase automatically provisions an SSL certificate. Finally, your custom domain becomes active and serves your content securely over HTTPS. The execution table traces each step with Firebase responses and user actions. The variable tracker shows how domain status, DNS records, and SSL certificate state change through the process. Key moments clarify common confusions about verification and DNS updates. The quiz tests understanding of verification steps, SSL status, and DNS impact. This step-by-step trace helps beginners see exactly how Firebase connects their domain to hosting.