No it isn't, although they say it is only for IE/FF on their website, there is a google chrome icon if you click on the page and I can download (on a mac) it with google Chrome and install it. I can't however with Safari And I don't want any other browser then Safari
Toolbar is only for IE/Firefox. I use Google Chrome and have downloaded the RS toolbar Chrome extention that Bored321 (that's his tip.it username) made, which, in my opinion, is better and much prettier than Jagex's!
Yeah but the chrome version is not a toolbar (or an extension either really), as it injects it into the top of every page causing increased loading and rendering times..
But as for the radio, that's been there for as long as I can remember (and has nothing to do with Jagex/Runescape like all the other options just another way for conduit to add more adware/spyware).