Useful, but... Rated 2 out of 5 stars
With the newest version, when there is no internet connectivity, the browser hangs or even crashes. I had to uninstall this in order to have full browser functionality for reading pages saved on my system during times of connectivity outage. Perhaps the author of this extension could program a delay of getting data until 15 seconds after startup. Otherwise it's an okay program. The alerts are too generic and the mouseover on the alerts doesn't work until you click on it. It gets annoying when an alert appears, and you have to click on it to discover WHAT the alert is about.
It was a good extension until someone screwed with it regarding the alerts and data-getting hangup.