Bugzilla

Quite some Places tests are still using synchronous mozStorage APIs and accessors:
DBConn() from head_common.js should be removed, plus
https://searchfox.org/mozilla-central/search?q=db%5Ba-zA-Z0-9%5C(%5C)%5D*%5C.(executeSimpleSQL%7Ccreate.*statement)&case=false&regexp=true&path=places%2Ftests%2F

These should be replaced with Sqlite.jsm syntax

Quite some Places tests are still using synchronous mozStorage APIs and accessors:
DBConn() from head_common.js should be removed, then the consumers:
https://searchfox.org/mozilla-central/search?q=DBConn%28%29&path=places%2Ftests&case=false&regexp=false
... should be replaced with Sqlite.jsm syntax (using await PlacesUtils.promiseDBConnection() if it's a read or PlacesUtils.withConnectionWrapper for writes)