@yeswap , right, I don't have a file manager. I dont really know that well this environment: it seems to only have a primitive viewer for Downloads. Thanks for the suggestion, I'll try this file manager you mentioned.
Chrome will include all that except the Opera part. Every user agent I've seen starts with Mozilla (the old Netscape), then Chromium-based browsers will mention khtml and Webkit, then Chrome, and after all that you get Opera.
(Khtml is a Linux rendering engine from the KDE project which Webkit/Safari and Blink/Chrome were based on.)