Here are some useful Google Chrome extensions which I use personally use on day-to-day basis. If you recommend any other extension besides the ones listed then please share your knowledge by posting a reply to this thread.
uBlock (blocks advertisements/spam): https://ublockorigin.com/
IP domain country flag (displays a flag representing the IP address of each website you visit, and provides easy access to domain/server information): https://chrome.google.com/extensions/de ... mejbcecdfp
High contrast - Invert the contrast of each webpage for legibility or night-time viewing: https://chrome.google.com/webstore/deta ... kmph?hl=en
VeePN - Free/easy to use VPN extension for Chrome https://veepn.com/vpn-apps/vpn-for-chrome/
Cookie remover - Allows you to delete the cookies which are set by any specific website in one click. https://chrome.google.com/webstore/deta ... fhce?hl=en