问题
I'm currently converting a Chrome extension into a Firefox add-on and would appreciate to replicate the chrome.storage.sync feature.
However, I cannot manage to find whether the data stored by a Firefox add-on using simple-storage will be automatically synced whenever a user of the add-on is signed into Firefox Sync.
Given that all the pieces of data stored via the latter method can be found in the user profile, I presume it will... as long as the add-on is available at https://addons.mozilla.org ?
Any information on the topic would be greatly appreciated.
回答1:
simple-storage is not synced. But you can sync it with little effort.
The trick it to store the storage object, it is serializable by definition, as a string preference and tell to the sync service to synchronize it.
Lets name that preference syncstorage and mark it as synchronizable.
var self = require("sdk/self");
var prefs = require("sdk/preferences/service");
prefs.set("services.sync.prefs.sync.extensions." + self.id + ".syncstorage", true);
When storing something to simple-storage reflect the change to syncstorage.
var sp = require("sdk/simple-prefs");
var ss = require("sdk/simple-storage");
sp.prefs["syncstorage"] = JSON.stringify(ss.storage);
For the opposite effect watch syncstorage for changes
sp.on("syncstorage", function(prefname){
ss.storage = JSON.parse(sp.prefs["syncstorage"]);
})
Last but not least, It would nice and perhaps mandatory to sync only with the explicit consent of the user.
来源：https://stackoverflow.com/questions/23318396/firefox-sdk-simple-storage-and-firefox-sync