Like all other free and open source software, software available under the MPL is available for anyone (including individuals and companies) to use for any purpose. The MPL only creates obligations for you if you want to distribute the software outside your organization.
We love open-source, and we feel this license more accurately embodies the spirit of open-source by requiring direct Vector code changes (not code around it) to be made in the open. This ensures that the entire Vector community benefits from changes. A fundamental princple of open-source.
Does it restrict usage?
No! It is not our intent to restrict Vector usage or distribution in any way, now or in the future.