Shocoben, you’re my hero.
Good question. Why does angularfire2 install a firebase folder inside your node_module?
The question:
To use p firebase service (I never understood this either) we must install in that order:
Npm install firebase angularfire2 --save
After Shocoben opened my eye: firebase is doubled.
1 - within node_module
1 - within angularfire2 / node_module
Solution:
In node_module / angularfire2 / node_module / => delete the firebase folder.
WORKED FOR ME - Thank you very much Shocoben