Mozilla heavily uses GitHub to host repositories for basically all of their projects (with possibly just the exception of Firefox itself). Anyone familiar with Mozilla’s open source efforts knows they use GitHub heavily, so stating that I didn’t see the source on their preferred platform is perfectly reasonable.
Your comment is pedantic and unhelpful. It is effectively the same as overhearing someone asking another person for a Kleenex, then choosing to interject and lecture that person on the difference between Kleenex and tissue paper when the other person does have actual Kleenex-brand tissue. Yes, I know what open source is. Yes, Mozilla uses GitHub. I even provided links to relevant GitHub repositories by Mozilla once I found what I was looking for.
The models and training pipeline are in the urls your posted and the evaluation of those models are hosted here [4]
[1] https://github.com/mozilla/firefox-translations [2] https://github.com/browsermt/bergamot-translator [3] https://github.com/browsermt/bergamot-translator/tree/main/w... [4] https://github.com/mozilla/firefox-translations-models/tree/...