Abrowser updates override user search preferences

I've noticed that every time Abrowser is updated, several of the "One-Click Search Engines" I had removed from Abrowser return. Specifically, Amazon and Google are re-added with each update. Others, like Bing, stay deleted.

Perhaps these search engines should not be built into Abrowser at all. I see no reason for Trisquel to promote the use of Google or Amazon, and removing the search engines would not prevent anyone from using Google or Amazon if they really want to.