Torbutton exception in Sandbox evaluation

After upgrading Firefox to version 15.0; Following errors are repeated displayed when connecting to any website or on clicking any link or refreshing.

[code] Torbutton Exception in sandbox evaluation. Date hooks not applied: [Exception... "Illegal operation on WrappedNative prototype object" nsresult: "0x8057000c (NS_ERROR_XPC_BAD_OP_ON_WN_PROTO)"
location: "JS frame :: chrome://torbutton/content/torbutton.js :: <TOP_LEVEL> :: line 4676" data: no] [/code] [code] Torbutton Exception in sandbox evaluation. Date hooks not applied: TypeError: can't redefine non-configurable property 'innerWidth' [/code]

Torbutton version: 1.4.6 Firefox version 15.0

Trac:
Username: gotor