I write to firebase but when my project open in emulator automatically close

[TIMAI2]

You might be able to use firebase on your older devices using the web component.

See here:

HOWTO: Have Secure Rules on Firebase, and allow Auth Users to Read/Write

Created a demo to show how to workaround secure rules access to Firebase once you have authenticated a user, using the web component and Firebase REST api. How to have Secure Rules on Firebase, and allow Auth Users to Read/Write [blocks (19)] Note: there is also an extension (paid) by Carlos Pedroza that resolves this issue, working in conjunction with the Firebase Authentication extension by Mrixtrem, I have tested this on a similar setup, and it works fine, but some strong rules are required…

(you can do it also with read and write set to true, without all the authentication parts, you do not need to even load the firebase component!)