So, in the future, it’s possible that the “pilot” tag will be removed
and that Mozilla could start earning a percentage from the donations.
Be that as it may, it’s a nice initiative: it doesn’t hurt to let users
easily contribute (Mozilla prefers the word “contribution” to
“donation” because they feel that the users who give money are
“supporting the future of a particular add-on, as opposed to donating
for something already received”) to the development of a particular
Add-on; after all, many of these Add-ons require a lot of work, and the
devs will be less likely to abandon them if they get monetary support
directly from the users.