Downloaded. Couldn't even try it stopped by request to register account. If every minor Chrome extension would require registration for usage, it would be nightmare. There are OneTab that does similar job very good with no need to provide an email.
This one looks like hustling to get your contacts and spam you.
Downloaded the product, looks great and perfect for a big problem I have had for years with bookmarks and then later realized that my brownser home page had change to toby?!?! what?? not cool. If you will change a setting in my browser you HAVE to let me know, and if you did let me know then it was not clear AT ALL.