Security extensions that you may want to consider including with IceDragon by default:
Adblock Plus Adblock Plus – Get this Extension for 🦊 Firefox (en-US)
(Subscriptions: EasyList, Fanboy’s Adblock List, Malware Domains)
HTTPS-Everywhere HTTPS Everywhere | Electronic Frontier Foundation
HTTPS Finder Background Color Change Purple – Get this Extension for 🦊 Firefox (en-US)
(Disable automatically enforce HTTPS when available, as users should be able to decide before a website redirects to HTTPS)
NoScript NoScript Security Suite – Get this Extension for 🦊 Firefox (en-US)
(Comodo might consider adding additional sites to the NoScript whitelist)
WOT Web of Trust, MyWOT/WOT: Website Reputation Rating – Get this Extension for 🦊 Firefox (en-US)
This has nothing to do with security and is a personal preference. As such it should be removed from IceDragon.
"Social media integration
Found an interesting page or video? IceDragon’s dedicated social media button makes it easy to instantly share your web-finds with your Facebook, Twitter or LinkedIn friends."