Edited your post and subject to make it a bit more clear what you are asking, so it stands out for those that can help you.
I've had a tumble with it, and found I can reset Chromium to its default Google search (not the Linux Mint Google CSE) by removing the following two folders. The first you need to remove as root.
This will erase all your preferences, bookmarks, and so on. So it is a bit heavy handed, but it does end up with a Chromium with default Google search. You can open a terminal and run the following command to delete the above folders in one go.
- Code: Select all
sudo rm -fr /etc/skel/.config/chromium ~/.config/chromium