A physical toolbar button was baked into the UI to allow quick sharing of pages to Facebook, Twitter, and LinkedIn, bypassing the standard tracker-heavy embed scripts found on websites.
To create a more secure fork, engineers at Comodo disabled or heavily modified standard telemetry and communication services that are enabled by default in standard Mozilla Firefox builds.
While Comodo IceDragon was a popular alternative for users seeking a more secure Firefox, it eventually faced challenges with frequent updates. Comodo IceDragon vs. Mozilla Firefox Comparison