I installed AFP 10.3 yesterday and was looking at its preference pane (in System Preferences). The Storage tab has an option to "Block all sites from storing information on this computer." When I checked its radio button, a warning popped up that says:
Disable Local Storage
Blocking all sites from storing information my disable functionality on some web sites.
This will also delete all data stored by previously visited sites, which may include game progress, login data, saved work, or preferences.
Then, one can either cancel or confirm the choice.
I opted to cancel, not knowing which sites this might affect. Thoughts or explanations?