Bug 921685: Read device geometry info from cookie to avoid sync reflows.
Bug 923637 - Use DataStore instead of indexedDB in the fb_data.js module
Merge pull request #13138 from jmcanterafonseca/fb_datastore_final

Bug 923637 - Use DataStore instead of indexedDB in the fb_data.js module
Merge pull request #13043 from wanderview/contacts-size-reflow

Bug 921685: Read device geometry info from cookie to avoid sync reflows. r=arcturus