almost good Rated 2 out of 5 stars

This is a potentially very useful extension - but it requires two essential things to enable that: (1) it is incredibly sensitive to the format; even if the grouping of the numbers is the same, if the delimiters are different it does not recognize the number. (2) in most cases I would need to look up a person based on the number from my address book - it would be great if that would also work (as matter of fact, this second was the reason I installed the add-on in the first place). Without these two features the add-on is of so limited use that very few people would need it.