It will be fine on mobile or IE or any other browser, its chrome. Basically Google, register all adverts and links and stuff and when something holds a "potential" (so its not necessarily harmful, could be adware, malware, virus but it could also just be an unverified link) threat it sends a warning (possibly if you go through google to here it will give the warning in other browsers), with Chrome being Google it will automatically flag it. But now it's registered as a potential threat to Google it will continue to display the warning until they are told otherwise. The warning can of course be ignored. Some anti virus's (predominantly Avast and AVG) are part powered by Google so again if Google register the issue, some Antivirus's will pick it up as being a potentially unsafe website also. Of course it is up to you if you choose to access, but with this being a website I use regularly and is usually safe it's a pretty safe bet to assume an advert or a link in a thread has caused the issue
/geekiness over (can't you just tell I'm a web developer by day
)