Supported browsers are Chrome, Firefox, Safari and Edge.
Terms of Service: https://policies.google.com/terms?hl=en
Evaluation (10 December 2018)
Registration asks to input first name, last name, birthday and gender in addition to creating the username and password.
User retains ownership of any intellectual property rights to uploaded content.
User is able to influence on what information is shared to other users.
/ Notices of changes are posted by 14 days in advance, but only on Terms of Service page.
Google receives a license to use all uploaded content in current and future services. This license continues even if you stop using the service.
Google collects vast amounts of information of the users.
Google tracks users on other websites.
Google can share personal information with the consent of the user. Google can also share or publish aggregated data that does not identify a person.
Login with Google Account or the organizations own account, if this is in use in their login services.
Google Photos own support: https://support.google.com/photos/?hl=en#topic=6128818
Flickr, iCloud Photos etc.