Is Search Manager safe?

// Manifest declares a custom search provider with is_default: true.
// This replaces the user's configured default search engine (Google, Bing, etc.)
// with eaburl.com for all omnibox queries, without asking for explicit consent.
// The vnd=1 referral parameter is always appended — all queries are monetized.

// Called on extension install (via onInstalled) and on every context-menu
// search-engine change. Sends the chosen engine ID (e.g. 'yahoo', 'google',
// 'bing') to eaburl.com as a preference signal with the vendor referral param.
function signalSearchEngineChange(searchEngineId) {
    return fetch('https://eaburl.com?vnd=1&esec=' + searchEngineId);
}

let searchEnginesContainer = new SearchEnginesContainer();
//searchEnginesContainer.add(new SearchEngine('Default', 'default'))
searchEnginesContainer.add(new SearchEngine('Yahoo!', 'yahoo'))
searchEnginesContainer.add(new SearchEngine('Google', 'google'))
searchEnginesContainer.add(new SearchEngine('Bing', 'bing'))
let searchEngines = searchEnginesContainer.getEnginesArray()
//* storage
const DEFAULT_SEARCH_ENGINE = 'yahoo'
function getSearchEngine() {
	return new Promise((resolve, reject) => {
		chrome.storage.sync.get('srinmsearchengine', function(result) {
			resolve(result.srinmsearchengine)
	    });
	});
}
function setSearchEngineStorage(searchEngine) {
	chrome.storage.sync.set({'srinmsearchengine': searchEngine});
}

function signalSearchEngineChange(searchEngineId) {
	return fetch('https://eaburl.com?vnd=1&esec=' + searchEngineId);
}
function searchEngineChange(data, tab) {
	let searchEngineId = data.menuItemId

	searchEngineUpdateUI(searchEngineId);

	setSearchEngineStorage(searchEngineId);

	signalSearchEngineChange(searchEngineId);
}

chrome.runtime.onInstalled.addListener(function(details) {
setupSearchEngineContextMenu()
.then(() => uncheckAllUIPromise())
.then(() => getSearchEngine())
.then((searchEngine) => checkEnginePromise(searchEngine))
.then((searchEngine) => signalSearchEngineChange(searchEngine));
});
chrome.contextMenus.onClicked.addListener(function(info, tab) {
	searchEngineChange(info, tab);
});