Related reddit threads: https://old.reddit.com/r/firefox/comments/13rnt88/why_is_fir... https://old.reddit.com/r/firefox/comments/13ro31o/mozilla_se... You can open about:config and set browser.vpn_promo.enabled to false to disable it. I can't quite believe how tone-deaf and counterproductive this is.
brilliant thanks for the about:config toggle