Add "Search enginge" on onion browser

Component

Onion is a browser application for browsing sites, but one drawback is the onion browser, ie the absence of search engine alternatives. onion browser only provides the search engine of yahoo, as the times I think need change.

Proposal

Add some search engine alternatives to allow users to access/use the browser onion app, for example by adding search engines provided by google and others.

Example

Benefits

with some alternative search engine, we users can freely determine the search engine we want, because every search engines have a look different, there is a simple, hard, and others. However, with some of these alternatives, the user can choose own search engine wanted.