5.3.1 works fine for me with latest Angular 8.3.24 and Firebase 7.8.0.5.4.0 or 5.4.1, my angular app loads a blank page. There are no errors in the terminal/console (and logging auth state and user id is successful), but inspecting the page shows that the <app-root> element contains only an empty <router-outlet> and no other components were loaded...5.3.1 works fine again...Are there any breaking changes in 5.4.0 I should look for? Thanks!
We did a lot of Zone.js work that landed in 5.4, that could be causing trouble. Hmmmm...
I'd say stick with 5.3.1 for now. Are you planning on migrating to ng 9 once it's out? Curious if you'd run into this with AngularFire v6 too, as in theory I rebased all that in...

If you have an easy repro feel free to share, [email protected]
Might related to #2309
Agreed. I'm taking the problematic share out and running the tests now.
@anisabboud can you check 5.4.2?
5.4.2 works well, thanks @jamesdaniels!
(Yes, I'm planning to upgrade to Angular 9 and AngularFire v6 once it's out.)
Excellent. Don鈥檛 hesitate to reach out if you have any trouble with the RC.
what is the latest stable version of firebase and angular that work well with 5.4.2?
AngularFire 5.4 should work correctly with Angular 8 and any recent Firebase JS SDK version. See peerDependencies in published package.json
latest stable version with angular 8
AngularFire: 5.4.2 Firebase: 7.10.0 Angular: 8.3.25
but with 9, is any already available?