That still doesn't explain why firefox has to be marketing for the Read it Later company. Why even bother having extensions if Mozilla going to pick and choose for you?
"this has absolutely nothing to do with money. We're shipping Pocket because we love their product, and so do our users. Pocket is, by very far, the most popular reading-list add-on used with Firefox."
Apparently they went too far: it's the most popular extension of that kind among people that care about reading lists (hardly the majority I think) and it's being hated by everybody that don't tolerate imposed choices. No good can come for Firefox and Pocket from this. If I were Pocket I'd ask Mozilla to unbundle the code into an extension as soon as possible because this is starting to be a PR backslash.