Disable automatic add-ons update
The option, "Update Add-ons Automatically", should be unchecked by default in the Tor Browser.
The option can be found under the Add-ons Manager page.
This is to protect against the installation of an automatic upgrade that could compromise the Tor Browser, or accidentally break some of the functionality, or be malicious in nature.
As an example, the latest Tor Browser 3.6.1 shipped with NoScript version 2.6.8.22. If left running the Tor Browser will upgrade to NoScript 2.6.8.26 without any user interaction or knowledge.
I think the users should always rely on the add-ons versions supplied by the tor browser bundle.
Thank you.