Question

using Builder online tool
https://builder.addons.mozilla.org/
to build and test my extension
now that I want to store data locally I’m following this tutorial
https://developer.mozilla.org/en/Storage
but the code snippets are not working for me
Should I be developing them locally using the classic SDK or is there a way to add SQLite support to the Add-on builder ?

Answer 1

Add-on SDK is sandboxed by default and doesn’t provide direct access to XPCOM. To use XPCOM objects you need to break out of the sandbox:

var {Cc, Ci, Cu} = require("chrome");
var {Services} = Cu.import("resource://gre/modules/Services.jsm");
var {FileUtils} = Cu.import("resource://gre/modules/FileUtils.jsm");

var file = FileUtils.getFile("ProfD", ["my_db_file_name.sqlite"]);
var mDBConn = Services.storage.openDatabase(file);

Note that Components stays undefined – use Cc instead of Components.classes, Ci instead of Components.interfaces and Cu instead of Components.utils.