Install the Firebase CLI using npm:
```bash
npm install -g firebase-tools
```

Log in to your Firebase account from the command line:
```bash
firebase login
```

Navigate to your project directory:
```bash
cd your-project-directory
```

Initialize Firebase:
```bash
firebase init
```

Select "Functions" and proceed with the setup. When prompted, choose to use TypeScript or JavaScript based on your preference.

Open the functions/src/index.ts or functions/index.js file and add your function:
```javascript
const functions = require('firebase-functions');

exports.scheduledFunction = functions.pubsub.schedule('every 1 hours').onRun((context) => {
console.log('This will be run every 1 hour!');
// Your logic here
return null;
});
```

The schedule string is a cron expression that defines when the function should run. For example, 'every 1 hours' triggers the function every hour.

Open the Google Cloud Console.

Navigate to "Cloud Scheduler" and click on "Create job".

Fill out the details:

Name: A unique identifier for your job.

Frequency: Choose how frequently you want the function to be triggered (e.g., every hour, daily).

Time zone: Select the appropriate time zone.

Under "Target", select "Pub/Sub" and choose the topic that corresponds to the Firebase function you deployed.

For the payload, add any JSON data your function needs (optional):
```json
{
"message": "Hello, World!"
}
```

Ensure your Firebase functions service account has the necessary permissions to interact with Cloud Scheduler.

Navigate to the IAM settings in the Google Cloud Console.

Find the service account with the email format [email protected].

Manually run the Cloud Scheduler job from the Google Cloud Console to ensure everything is working as expected.

Verify that the Cloud Function is triggered and executed properly by checking the logs in the Firebase Console under "Functions" -> "Logs".