Zero. Because, once again, the open source Pocket code contained within Firefox is only ever activated if you specifically choose to use it. It's not even loaded due to lazy loading.
So you're saying there is no new button that shows up? Claiming that zero users moved to pocket because of the automatic integration, then you're being delusional. It amounts to an endorsement from Firefox at the lease and the assumption that it's not a different company for inexperienced people.
Sure, but if you make a visible button on the second most popular browser that links to your product, you would get a lot of users and some of them would sign up for the paid service.
I bet the number of users would be much smaller if there was no such button.
Yeah, of course the numbers would be smaller if there was no such button, nobody is saying otherwise. They're just stating that nobody was forced to use Pocket after the integration.
How hard is that to understand?
> Force [verb]: make (someone) do something against their will.