NetCaptor looks too much like Internet Explorer and has an add to buy NetCaptor Pro. Mozilla doesn't make a difference between basic and pro and you certainly don't have to buy a decent browser.
I learned HTML by looking into the source of webpages at first, and at a later stage, I downloaded the W3C HTML guide which I've learned a lot from.
And no, target="_blank" doesn't open a new tab in Mozilla. You can use your middle mouse button for that.