First get Firefox then use it to access the links below and install the respective add-ons.

“uBlock Origin” by Raymond Hill
Efficient ad-blocker. Easy on CPU and memory

“Privacy Badger” by EFF
Automatically learns to block invisible trackers

“HTTPS Everywhere” by EFF
Enforces HTTPS encryption whenever possible, even when opening plain http links

“Flagfox” by Dave G
Displays location country flag for current website, site safety check, whois lookup

“Decentraleyes” by Thomas Rientjes
Prevents content delivery networks (CDN) from tracking you

“Facebook Container” by Mozilla
Prevents Facebook from tracking you around the web