Getting cors error even after following all the steps you have mentioned on readme about cors-server HOT 3 CLOSED

Some people were having issues with Firebase, usually with POST requests.

The easiest way forward is probably to use fly.io instead. Give that a go and let me know how you get on.

from cors-server.

Oh actually I realized that the issue is that I did not add "allUsers" as permission to call my firebase function. After I added that, It worked fine atlease from my localhost:3000 port, however Im still facing issues when I actually try to call it from the website that I have hosted on netlify.
Nevertheless, thanks for this repo, it is really helpful but you might want to add that additional section for the firebase readme to enable the permissions

from cors-server.

Yeah no problem. Is that allUsers permission that you have set from the Google Cloud Platform dashboard or where are you referring to?

Also did you attempt to deploy from fly.io or not? If the latter, I would really recommend giving it a go as it should only take a few minutes and could solve your issues.

from cors-server.