Beware! This piece of software will put your private data at risk. From their EULA: "The Services improve your use of the Internet, among other means by enabling your device to load portions of data from various websites and servers and by re-routing some of your requests through other Fraudscore resources. Your use of the Services will in turn enable Fraudscore to access portions of data from your device and to be re-routed through your device"
In plain English this means that your browser will become part of a proxy network, that illegal activities may be performed THROUGH your computer, and that you explicitly give Fraudscore (the company) access to your data.
I don't understand how this piece of malware has become a featured add-on. What are you doing, Mozilla?
The previous reviewer is correct, this feels very suspicious. The review before his own is some babble about literacy, not even relevant yet still a 5-star review. This addon on the Chrome Store has 1 5-star review, also glowing with some nonsense about popups (as if we don't already have well-known addons that block those...). On the support page, just 1 comment from another russian looking to buy the addon off the company (perhaps to make it seem worth more than it is? fraud anyone?).
Here's a presentation from a company that seems to be related: https://www.slideshare.net/FraudScore/fraudscore-fight-mobile-advertising-fraud-effectively - 3 likes, 1 is the company, 1 is the owner of the company as an employee of another company, 1 is a spammer. The whole thing has zero content, just vagueness about how your conversion rate suffers if people think _you_ are fraudulent. Sounds like they want this to take off so they can ransom people's fraudulence scores for money (they have the prices at the end of the presentation).
This addon has 1 version exactly, no others. It's made by a big anti-fraud company (with sophisticated artificial intelligence apparently) but it's still in alpha? It seems that's what the version implies. Looks like a fraudulent version number. That claim about artificial intelligence sounds like fraud as well. Big, fat claims to sound credible with nothing to show for it.
You know what, this whole thing reads, looks and sounds like fraud, almost ransomware. These days on the internet unless you actively and deliberately install suspicious things you are never at risk from malware - browsers are sophisticated enough to prevent that. The only way that can happen through browsers is with extensions.
What's extra suspicious is that this extension is compatible with the latest Firefox version, even though it was last updated a year ago. Firefox has since gone through a lot of changes in the add-on APIs marking all extensions as "Legacy" unless they're using WebExtensions. Yet this addon seems to have dodged all that and is also featured with just a few thousand users, almost none of which had anything to say about it?
This addon is the fraud. If you want malware protection use AdBlock Plus or Ublock Origin. Those do the job just fine. There is nothing to protect you from that those won't do already, unless you're a complete fool.
Do yourself a favor, use either ABP or UO to block malware domains. They do the exact same thing this one does except they actually do respect your privacy, they are far more liable due to their user numbers, you can configure any of the public blocking lists you want and add your own and they are most certainly better coded than this fraudulent junk.