If I run this test in Opera first time, then I get a popup, where I can set the storage size of this domain. But if I click cancel, then the next time there is no popup, the storage size will be the default.
So how to set the localStorage size per domain in Opera?
To change the general quota limit, visit
opera:config#PersistentStorage|DomainQuotaForlocalStorage.To read/edit the per domain quota preference, open your profile directory (the location can be found via Help > “About Opera”), and edit
override.ini(multi-user). You can also open Opera’s application folder, and editoperaprefs.ini.The format is as follows:
At the domain section, the first entry is the quota limit. The second entry is zero when you reject the request for quota expansion.
For more information, see Opera’s settings file explained#Persistent storage.