Looks like they don't have ann in here, i can't sure if they are legit.
They have:
[ANN] Guarda is introducing the advanced Multicurrency Web Wallet!-
They seem to be but they're not legit (I tested their wallet [not the extension] when it was announced but I advice everyone to "stay away from their services").
- "ni23457" exposed their connection to few other exchanges that have/had accusations (follow his post on the ending part of the above thread): First > Second
- Eventually, he recovered his funds after 3 months but still, "you shouldn't trust services that are somehow connected to mentioned services, from the above links".
With those diagrams I have read,i don't know if someone would still decide to continue to use it up after reading up that link.
I'm not really got used to involve myself into any extension excluding metamask. I don't consider to install if it doesn't have sufficient reputation or feedbacks and with this one then its better to stay away
if you don't like to experience problems.