Hi, I have installed Firefox on my second machine at work, and I find it impossible to use it as it does not connect to many of my company's services, but also on many mainstream sites. For example, when I try to load sites like theguardian.com I get a window with the warning: "Did Not Connect: Potential Security Issue", for others like nytimes.com the message reads "Warning:Potential Security Risk Ahead". The lists of sites where these happens is long. The thing is that on my other machine at work these sites are working perfectly. I have just loaded Firefox on the new machine, I have not added any extensions or plugins yet. I am about to loose the old work PC, and it would be a shame if on my new machine I had to use Chrome! Any help is appreciated Thanks Alex PS I am writing this from my own laptop and not from the work PC