Allow users to choose what search engine they want to use. You are forcing the user to have Bing as the default when most people use Google Search. You give a widget for Google search but also don't allow us to remove the main search which is auto focused for bing.

I like this extension, but have finally decided to move on because the developers have had this asked of them but have ignored anything about it.

Listen to your users next time when they give you feedback, you are only failing yourself when you don't.