It's more un-fathomable if you recall Mozilla were the people who *pioneered* local browser ML as a privacy feature. Back in 2022—when Chrome was doing language translation by uploading to Google servers, and Mozilla introduced the (actually innovative!) idea of baking small ML models into the browser,

https://news.ycombinator.com/item?id=33792447 ("Firefox Translations: Translate websites in your browser without using the cloud (addons.mozilla.org)")

And look: they were 100% cognizant, then, of how vital local processing is to privacy:

> "...called Project Bergamot. The ultimate goal of this consortium was to build a set of neural machine translation tools that would enable Mozilla to develop a website translation add-on that operates locally, i.e. the engines, language models and in-page translation algorithms would need to reside and be executed entirely in the user’s computer, so none of the data would be sent to the cloud, making it entirely private."

https://blog.mozilla.org/en/mozilla/local-translation-add-on... ("Mozilla releases local machine translation tools as part of Project Bergamot")