Not working with localized URL
The extension does not activate on international URL. Google will default me to http://www.google.com.sg/reader/view/?tab=my (note the .sg extension in hostname) for which pressing v open the tab in the foreground (as per default). If I edit the URL to remove the .sg, the extension is enabled: pressing v will open the tab in the background.
Thank you for this extension! This fixes my biggest frustration with Google Reader.