how to make an app in mit app inventor that runs in background
Please search the community before asking any question. This has been asked many times before.
https://community.appinventor.mit.edu/search?q=run%20background
I know that i can use tasker extension but i need to call a certain function that checks that is the data of firebase has changed. But i cannot find out that how i can do this.
What extension is that? You mean this
Yes, that's only the extension