From the announcement: "Pocket will become a wholly owned subsidiary of Mozilla Corporation"
Mozilla Corporation is a for-profit, taxable entity. Here are their articles of incorporation: https://www.mozilla.org/en-US/foundation/documents/articles-.... It is itself a wholly owned subsidiary of Mozilla Foundation, which is the non-profit thing that people call "Mozilla". The Foundation is really just a holding company. The thing that people call "Mozilla" that does all of the work is The Corporation.
The foundation exists as a separate entity because laws prohibit charitable donations from being used for all but a small number of categories, and software development generally does not fall under such a category. The funds received by the foundation pretty much have to go towards education (or things that can be justified as education, e.g. sponsoring educational conferences or sponsoring attendees to such conferences). Charitable donations can't be used to fund Firefox development.
Mozilla Corporation is a for-profit, taxable entity. Here are their articles of incorporation: https://www.mozilla.org/en-US/foundation/documents/articles-.... It is itself a wholly owned subsidiary of Mozilla Foundation, which is the non-profit thing that people call "Mozilla". The Foundation is really just a holding company. The thing that people call "Mozilla" that does all of the work is The Corporation.