3 steps to to make a Cloud Storage bucket public

We need 3 configurations to make a bucket public to everyone.

1. Remove public access prevention

A bucket cannot be accessed by public as the default. So we need to remove public access prevention.

1. Go to the Bucket details > Permissions tab > Public access section
2. Click Remove public access prevention and confirm

2. Add permission for allUsers (e.g. to view objects)

1. Go to the Bucket details > Permissions tab > Permissions section
2. Click Add and fill in the following information, then click Save
   1. New principals: allUsers or allAuthenticatedUsers
   2. Select a role: Storage Object Viewer

3. Change Access control to Fine-grained

1. Go to the Bucket details > Configuration tab > Permissions
2. Edit Access control field to Fine-grained

References

https://cloud.google.com/storage/docs/access-control/making-data-public#buckets