I havve been a "registered user" of iCab since version 3.0.3. Upon downloading, and exporting my Safari bookmarks, I gave it my "browser security test"; it passed!; of course! I then went to familiar websites; it passed again; I can go on, but it's installation of "no extensions" it;s use of ram, is very important, as a web browser will use "resources" as you go along. I love the download manager; what a wonderful sight to receive infformation as it downloads. The poster who complained about it as shareware should be careful; upon downloading you will receive a message to pay; I did sevral years ago! At any rate, I would give it 6 stars if I could!