Can anyone vouch for playism-games.com?

I recently discovered a game that I really want to purchase and play. However, the only distributor of the English localization that I can find is a website called playism-games.com (apparently it is the official distributor as well).I've done a lot of Googling on them, and they look fairly legit: a publisher that bring Japanese games to the west and vice-versa, with a lot of well-known gaming outlets (such as rockpapershotgun) talking about them and linking to them in articles concerning games they provide. Generally, this alone would be enough to make me trust them.However, I went to make an account and I got a pop-up from Firefox: this website is not secure and data entered into it could be compromised.Believe it or not, I've never encountered this before (maybe I just don't visit shady parts of the web?) and I don't know how to proceed. Is it safe to trust his site? Do I have to worry about things like my password or CC info being stolen?Does anyone have experience using playism-games.com and can they vouch for the safety of their website? Is it safe for me to make an account and purchase from them? via /r/gaming http://ift.tt/2ukKc2q