Why would people insert their recovery phrases in to an add-on? The only add-on I trust is Meta mask, even with Meta mask I don't import my eth wallet that consist of huge funds, staying safe is very important if you don't want end up with nothing but bad news
True, I also use Metamask on my browser add-on, because it has been proven safe and reliable to be used by many people in terms of transactions, and apart from that I also have never used any add-ons if they are not truly trusted, because it is very risky for ourselves.