From their TOS: “When you submit your own content through the Services, you continue to own the rights to that content. You grant Mozilla a worldwide, royalty-free, perpetual, irrevocable, non-exclusive, transferable license to use, copy, modify, adapt, sub-license, prepare derivative works from, distribute, perform, and display the Inputs for the purpose of operating the Services.” Linked content [1].

[1] https://orbitbymozilla.com/