There are a number of sites accessed thru Firefox (guess Google too) that are shown as "NOT SECURE". Click on the little padlock or the "i" in the information bar upper left when you open a site it will give all the info. This just started with the last few Firefox updates. While this sites server computer may be ok there is a chance of being hacked from your own computer. If I click on it for this site I get the not secure message. If you see a green padlock you should be safe.