How to keep Firebase onSnapshot listener active in a Chrome extension background script?

Question

Description:

I am using onSnapshot in my Chrome extension background script to listen for real-time updates to a Firestore database and cache the changes in local storage. I attch the listener after a user successfully logs in. It works well, but after some time of inactivity, the listener stops working. I suspect this is due to the background script going inactive. How can I keep the background script running and ensure that the onSnapshot listener stays active?

Code Example

background.js

onSnapshot(
    doc(db, "customers", uid),
    (doc) => {
        const data = doc.data();
        chrome.storage.local.set({'userData': data}, () => {
            console.log('User Data Changed', data );
        });
    },
    (error) => {
        console.log(error);
    }
);

Any help or suggestions would be greatly appreciated. Thank you!