[BUG] Feature "keep me signed in" does not work properly

Description:

Function signed in does not keeping me signed in. When I close a tab with organize tube, then close the browser, after reopening browser and organize tube, login screen is shown.

How reproducible:

100%

Environment:

Windows 7

Firefox 17.0.2esr

Steps to reproduce:

1. login to OT with "keep me signed in" enabled

2. close the OT tab

3. close the browser

4. open browser

5. open OT

6. login screen is shown, instead of logged in OT