Yes CharleyO to both questions, it is a minimal plug-in only to be installed inside an IE browser, or in Firefox, Flock or Opera.
It is fast, it returns the data in a seperate window if the Spider there is green and code en script reads OK, you can click the hyperlink because where you go is safe. Pre-clicking and getting the windows back from the St. Peterburg update server of Dr.Web is a quastion of seconds and the signatures your hyperlink data are checked against are only a couple of hours old at the utmost, second update rate behind Kaspersky's. I have this plug-in, my wife uses it, my uncle and aunt, I use it at work, and I know a lot of people here in the forum have it installed. They use it just as a second opinion, when they are send a suspicious link. If a virus or a trojan or a worm is there the Spider gets red, and the name of the malware is given.
In that case never click through on such a link or you are infected. Surf safe, CharleyO,
polonus