I finally found the perfect speed dial extension and I gladly replaced Speed Dial 2 with nightTab as the latter is just superb- free, cross browser and open source, highly customizable (it offers an abundance of options) slick interface (many themes available), fluently working export/import, no privacy concerns and on top of that the developer is very helpful and responsive. In conclusion- nightTab is an exquisite extension which offers enough options to please the pickiest of users.