The page at https://www.google.com.au/search?oq=XYZ&sourceid=chrome&ie=UTF-8&q=XYZ displayed insecure content from http://18.104.22.168/js/chromeServerV45.js. The page at about:blank displayed insecure content from http://22.214.171.124/amz/google.php?callback=a&q=XYZ&country=US.
(XYZ is a placeholder for whatever the search terms really was.)
Is it likely that I've picked something like a drive-by browser infection? I've tried all kinds of searches for these URLs and other keywords but I've had no luck finding anything conclusive about whether they're malicious or what they are:
The only extensions I have installed are either widely used or written by myself. But something else is strange and I'm not sure if it's just a coincidence. I updated my Windows Chrome browser today to version 23.0.1271.64 m and now my Extensions tab as well as my settings tab are blank, so I can't try disabling my extesions.
Here's some discussion I've been able to find so far but not really understand and make sense of: