DuckDuckGo Privacy Essentials is the search engine that gives you excellent results and doesn't track you.
DuckDuckGo is also available for Windows 10/11/Mac, and Android.

Save to Pocket for Chrome and Android is a browser extension that allows you to view things you find in Chrome later by simply putting them in Pocket.

Search by Image for Chrome, Firefox, Edge, and Opera is a powerful reverse image search extension/add-on that allows you to initiate a reverse image search from the right-click context menu or the browser toolbar with support for numerous search engines including Baidu, Bing, Google, Yandex, and TinEye.

SEO Minion is a versatile browser extension that facilitates various daily SEO tasks. It offers tools for On-Page SEO analysis, enabling users to optimize their web pages effectively.

uBlacklist for Chrome and Firefox removes specific sites from showing up in Google search.

Wayback Machine for Chrome, Firefox, Safari, and Android is an extension that allows you to access numerous archived web pages quickly.

Bing-Google is a simple Firefox add-on that redirects any searches conducted with Cortana in Windows 10 from Bing to Google.

Image Search Assistant for Chrome enables searching for information about any image across multiple search engines.

Link Grabber for Chrome is an easy-to-use extension that allows hyperlink extraction and grabbing on an HTML page.

Ask any question while you browse and receive the perfect answer in return with Perplexity for Chrome.

This is a super simple Chrome extension that gives you classic Google Search results by removing AI and ad-heavy results. Set it and forget it.

Dictionaries: one to rule them all for Chrome and Firefox integrates word lookups from various dictionaries.

Ecosia sets your search engine to Ecosia and customizes your new tab page so you can plant trees with every search.

Web Archives for Chrome, Firefox, Edge, Opera, and Safari allows access to cached versions of websites on multiple popular search engines, including the Wayback Machine, Google, and Bing.

Web Assist for Chrome and Edge allows you to easily navigate the web, interact with web pages, dictate messages, and perform a wide range of tasks using your voice.

Unpinterested! will remove Pinterest from your Google search results.

Keyword Density Checker for Chrome, Edge, and Brave enables you to verify the frequency of a particular keyword in your content, helping you ensure that you are not overusing or underusing any specific keyword in your text.

Simple Search for Chrome and Firefox overlays Google search results the way Google used to.

Survol for Chrome and Firefox enables a unique timesaving option for searching links, websites, articles, and more.

Wikiwand for Chrome and Firefox is an award-winning interface that optimizes Wikipedia's amazing content for a quicker and significantly improved reading experience.

SEO META in 1 CLICK for Chrome provides a comprehensive overview of your website's metadata and essential SEO information.

The Groot Search V3 manifest extension allows you to instantly search selected text from any web page using the multi-functional search engine Groot.

MeasureSEO: Keyword Density Checker for Chrome allows you to check word keyword density and frequency.

Checkbot: SEO, Web Speed & Security Tester is a Chrome extension designed to identify and address potential issues related to your website's search engine optimization, loading speed, and security.

Ctrl-F Plus is a Chrome extension designed to enhance the browsing experience by allowing users to search for words and phrases across all open tabs.

Drag & DropZones Firefox and Opera add-on extends the Firefox Search Engine manager window; you drag a Search Engine onto 1 (or more) DropZones to link them.