quickstart-js | Firebase Quickstart Samples for Web | Authentication library

i am try to use firebase-cloud-messaging with javascipt

and i use this repo : https://github.com/firebase/quickstart-js/tree/master/messaging

in the Get Started i must run this command npm install -g firebase-tools. but i got error like this :

I have a very frustrating error involving the use of API key with Firebase Authentication.

I am using https://github.com/twilio/video-quickstart-js to run a video conference project. I want to allow users to join without a camera. So, they can only use a mic.

With Twilio video conference, user can join video conferences without a camera?

When deploying Firebase Functions using the Firebase CLI, they are configured so that the Cloud Functions Invoker permission is granted to allUsers. With such a setting the code below functions as expected.

The Cloud Functions Invoker permission can also be granted to allAuthenticatedUsers. However, when I implement this change for addMessage, I only ever get a UNAUTHENTICATED error response using the code below.

Why won't allAuthenticatedUsers work for this Firebase Cloud Function?

Note: This Q&A is a result of a now-deleted question posted by Furkan Yurdakul, regarding why allAuthenticatedUsers wasn't working with his Firebase Callable Function for his Firebase app

MWE based on the documentation, with addMessage defined here:

We are trying to implement a publisher/subscriber model on our Frontend with Firebase.

Our goal: Deliver a message from JS-client publisher to JS-client consumer as fast as possible – ideally using WebSockets.

The Firebase documentation concentrates rather on Android/iOS devices, but it doesn't well clarify the difference between server-side and client-side JS solutions.

What I understood is that we primarily need to associate the device with a topic on the server, however, then I am not clear whether we can publish/consume the topic without server interaction.

https://github.com/firebase/quickstart-js/blob/8a5887858ea672efbeebabd85c057415809b9a8c/messaging/index.html

This example demonstrates subscription to a topic and handling the incoming messages – but – is it also possible to directly publish to the topic?

After you have created a topic, either by subscribing client app instances to the topic on the client-side or via the server API, you can send messages to the topic. If this is your first time building send requests for FCM, see the guide to your server environment and FCM for important background and setup information.

(Taken from https://firebase.google.com/docs/cloud-messaging/ios/topic-messaging) Here they mention the fact, that one can subscribe to a topic directly from a client? How so? From the doc and example above this seems not possible?

There is a NodeJS example of publishing to a topic:

I am a beginner at node.js and need to host an application that I didn't personally write on an azure server for some testing. The site runs fine locally hosted, as well as hosted using ngrok. Yet, when I host it on azure, I get the following error:

My goal is to build a WebGL game in Unity that has a specific form and upon submission that form posts data into one of the Firebase storage solutions. After reading this article, it's clear to me I need to use Cloud Firestore instead of Realtime Database. Good news is that as of of March 2020, one of the team members wrote,

we released Firebase Unity SDK 6.12.0 which includes an alpha release of Firestore.

Thing is, Firebase's Unity SDK isn't for WebGL builds and, for someone going through that thought process, could use Firebase JS SDK (spam alert). From looking at the release notes, one can see that Firebase JS SDK supports Firestore and so this has all the conditions in place for a quick solution.

So, I've gone to Firebase console, created a project, a Web app to use Firebase JS SDK and this process gave as output the following code

I've been loosely following the boilerplate in quickstart-js. I don't want to rely on Chrome's identify provider but rather want users to be able to sign in to my extension with their Google login using a popup so I haven't gone through the song and dance of requesting identity permissions in my manifest.json. My file is as follows:

Here I am trying to access the user's data from real time database by providing the UID. I have tried so many things but none worked. I have followed the documentation but no luck I am keep getting error -

Sending back results [promise]

Another example for writing the data which I have followed to create my logic but it didn't worked -