User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8) Gecko/20051111 Firefox/1.5 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8) Gecko/20051111 Firefox/22.214.171.124 Forefox 1.5 works fine. Upgrade to 126.96.36.199 does not permit any URL to load. Tried numerous common sites. Revert back to 1.5 and all is well. Checked firewall settings (McAfee Personal Firewall with Firefox set to allow full access). Reproducible: Always Steps to Reproduce: 1. Upgrade to 1.5.01 or DL 188.8.131.52 as separate install. 2. Open browser. 3. All URLs give samer error message: URL nopt available, try again later or check firewall settings or (can't remember the other failure message). Actual Results: All URLs tried failed to load. Expected Results: Expected 184.108.40.206 to work as smoothly as 1.5.