Web storage in Opera can be configured using preferences in the "Web Storage" section in
Opera supports the ability to create databases.
For further reference see: W3C Web SQL Database
"Beware. This specification is no longer in active maintenance and the Web Applications Working Group does not intend to maintain it further."
"This document was on the W3C Recommendation track but specification work has stopped. The specification reached an impasse: all interested implementors have used the same SQL backend (Sqlite), but we need multiple independent implementations to proceed along a standardisation path."
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