User Agent Switcher

Enables you to better understand the evolution of browser fingerprints (which is what websites use to uniquely identify and track you). Download: Chrome - Firefox

Block fingerprint without removing access to HTML5 Canvas element. Canvas fingerprinting is commonly used for tracking, this extension helps to mitigate this through disallowing the browser to generate a true unique key Download: Chrome - Firefox - Edge

This extension will automatically remove tracking elements from the GET parameters of URLs to help protect some privacy Download: Chrome - Firefox / Source

Similar to LocalCDN, Serves up local versions of common scripts instead of calling to 3rd-party CDN. Improves privacy and load times. Works out-of-the-box and plays nicely with regular content blockers. Download: Chrome - Firefox - Opera - Pale Moon - Source

Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs that preserve your privacy. Cookies are separated by container, allowing you to use the web with multiple identities or accounts simultaneously. Download: Firefox

Displays a country flag depicting the location of the current website's server, which can be useful to know at a glance. Click icon for more tools such as site safety checks, whois, validation etc Download: Firefox

A browser extension that redirects popular sites to alternative privacy friendly frontends Download: Firefox - Chrome

Linguist is a privacy‑focused translation solution in-browser that has an embedded offline translator and lets users create custom translators to use any translation API, even if it's locally deployed. Full-page translation, selected text translation, dictionary, history, and other features you may expect of a full-featured translation solution in-browser. Download: Chrome / Firefox

Emulates remote frameworks (e.g. jQuery, Bootstrap, Angular) and delivers them as local resource. Prevents unnecessary 3rd party requests to tracking CDNs Download: Firefox

Notifies you when visiting a known or potential phishing site, and detects suspicious JavaScript (including skimmers and miners). Also provides a simple rating for a given site's legitimacy and security. Great for less technical users. Netcraft also has a handy online tool: Site Report for checking what any given website is running. Download: Chrome \ Firefox \ Opera \ Edge

Blocks invisible trackers, in order to stop advertisers and other third-parties from secretly tracking where you go and what pages you look at. Less configurable but simpler than uBlock, and focuses on trackers only without blocking ads. Download: Chrome - Firefox

Simple extension by DuckDuckGo, which grades the security of each site. Download: Chrome
Firefox

Prevent Firefox from sending Origin headers when they are least likely to be necessary, to protect your privacy Download: Firefox - Source

The companion extension for PrivacySpy.org - an open project that rates, annotates, and archives privacy policies. The extension shows a score for the privacy policy of the current website. Download: Chrome - Firefox

Some web pages use intermediary pages before redirecting to a final page. This add-on tries to extract the final url from the intermediary url and goes there straight away if successful Download: Firefox - Source

Block ads, trackers and malware sites. Download: Chrome - Firefox

View archived and cached versions of web pages on 10+ search engines, such as the Wayback Machine, Archive.is, Google etc Useful for checking legitimacy of websites, and viewing change logs Download: Firefox - Chrome - Edge - Source

Provides user control over WebRTC privacy settings in Chromium, in order to prevent WebRTC leaks. Download: Chrome. For Firefox users, you can do this through browser settings. Test for WebRTC leaks, with browserleaks.com/webrtc