In order to view your Slingbox on a Chrome browser, an extension must be installed to Chrome. On my version of Chrome, this extension is WebSlingPlayer version 18.104.22.168. I don't recall any warnings on installation like you are receiving. Nor have a noticed any funny behavior of my computer or router when I use the SB. You could also install the standalone Slingplayer application on your computer, if the access to the SB through a browser window worries you about security issues.