[scott_karana]

When Pocket was first added, it was an independent company with no signs of any acquisition by Mozilla.

It was not added to the browser as an "add-on" but as core code. Sure, you could hide the button, but... it's still there, attack surface and all.

Plus, it's a product in a competition-rich field. Adding first class support almost certainly affected adoption for competitors like Instapaper, Pinboard, etc, who still had to play by the rules. Hardly what you'd expect from a "choice centric" company like Mozilla, and it screamed of a cash bribe.