Hello Wilders, I got a popup from PrivateFirewall warning me that taskhost.exe was attempting to connect to 18.104.22.168 through Firefox. It's the first time ever I've seen taskhost trying to connect so I blocked it. When it happened I was indeed with a sandboxed Firefox window open. However, why did taskhost try the connection? The taskhost.exe path is C:\Windows\System32 which, I reckon, is the correct and "safe" one. Now the odd bit is that 22.214.171.124 is a Mozilla ip. I've scanned my computer with Mbam and Avast and nothing showed up. There are no start up entries, strange process or services running. I did a search and found a topic related to taskhost, but unfortunately there isn't much info. What's going on? Should I worry about it? It only happened once, but better safe than sorry. I'm on Windows 7 HP x64. Thanks.