And “Nimbus experiments” (per Katy’s post below) means “ads”?

Not new, believe it or not. In 2017 they rolled out the creepiest experiment possible and then apologized with language that would be at home today.

“Although we always have the best intentions, not everything that we try works as we want,” said Jascha Kaykas-Wolff, Mozilla’s chief marketing officer… “This was not a paid promotion but rather a collaboration that was intended to be fun.”