“Arrr! Something Tried to Commandeer Your Default Search Setting! We weren’t sure what to do, so we set it to Google.” Welcome to a brand new feature on Chrome.
Google Chrome now protects your default search engine. It won’t let any third party app change your default search engine. Here is a video from FranÃ§ois Beaufort . He is showing this on Chromium however, I could see this on the Canary build this morning. So, you may not need a flag to get this working.