I see this error at Firefox start in the error console when GM extension is enabled:
Timestamp: 12/07/2013 6.40.48 Error: NS_ERROR_ILLEGAL_VALUE: 'Illegal value' when calling method: [nsISessionStore::getWindowValue] Source File: chrome://browser/content/browser.js Line: 6070 -- You received this message because you are subscribed to the Google Groups "greasemonkey-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/greasemonkey-users. For more options, visit https://groups.google.com/groups/opt_out.
