Adding more relevant search options into the Metamask browser

**Describe the usability problem**
Within the Metamask browser, there are no options for search engines that cater to web3 users (Presearch, Brave etc.). Users who use Metamask would use web3 alternatives to search if they had the option.

**Screenshots**



**Proposed behavior**

Adding at least 1, *i am biased because I am on the team at Presearch* but preferably as many search options as possible that are catering to web3 users, as an option to search within Metamask browser. I proposed starting with Presearch as the default, but adding both Presearch and another web3 search engine would be easy to do, provide metamask users with a privacy search engine like duckduckgo but with web3 components.

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**User impact | Usage frequency | Feasibility scores**
_How important is this to the user, what the user wants to accomplish | Daily, weekly, monthly | Small, medium, large_

The issue does not name files, tests, or an entry point. Start by locating the MetaMask browser's search settings and compare them with the proposed Presearch and other web3 options. Done means users can select the supported search engines in the browser and search successfully.

Written by the indexing model from the issue text.