You have it backwards. Free and Open Source software is Open Source (subset). But Open Source is not Free and Open Source (superset).
Langfuse is a great example of where this is the case: https://github.com/langfuse/langfuse/blob/main/LICENSE
It is open source, but all features under the ee
folder are not free, thus it is not FOSS.
The implementation doesn’t sound terrible.
So if you already use GPT for day-to-day, it may be a welcome experience. If you don’t, don’t opt in.
I’m skeptical of GPT add-ons, bit at least this was done in a low-bloat opt-in way (which allows Mozilla to bring in revenue (probably)).
3D printer guy from yesterday beat them to it.