1. Go to a Jenkins page
2. Right click on the "for all" feed
3. Select "Add Link to Jenkins Build Monitor"
4. The dialog drops down with the URL name and the not "Unable to add link to Jenkins Build Monitor. Please remove one of the existing feeds" (there are currently no feeds in the monitor)
5. The error console displays:

Error: uncaught exception: [Exception... "Component returned failure code: 0x80570016 (NS_ERROR_XPC_GS_RETURNED_FAILURE) [nsIJSCID.getService]" nsresult: "0x80570016 (NS_ERROR_XPC_GS_RETURNED_FAILURE)" location: "JS frame :: chrome://buildmonitor/content/firefox/init.js :: anonymous :: line 5" data: no]