Buried in lede: the feature currently sends pre-Smart Window browsing activity to 3rd parties (Google, Alibaba, OpenAI) without warning you that this data was even aggregated and sent.
Beware testing Firefox "Smart Window": Mozilla sends a summary of earlier activity to 3rd parties

I was [reading a review](https://www.omgubuntu.co.uk/2026/03/firefox-smart-window-hands-on) of Firefox's experimental Smart Window feature, and thi…

No no they “fixed” that because people complained.

Supposedly.