uBlock Origin - Popular and efficient blocker for Chromium, Chrome, Edge, Firefox, Opera, Safari, Thunderbird.
XPrivacyLua - Really simple to use privacy manager for Android 6.0 Marshmallow and later (successor of XPrivacy).
Blokada - The best ad blocker for Android. Free and open source.
App Ops - modifies the settings of "appops" in Android system
Adblock Plus - AdBlock Plus is a browser extension for Firefox, Chrome, Opera, and several other popular browsers that prevents intrusive ads like pop-ups and malicious code from appearing on websites you visit.
PilferShush Jammer - Block unwanted use of onboard microphone