4 ms·I use Firefox with Gmail every day and have never seen such a message.by rendall 3y agoI use Firefox with Gmail every day and have never seen such a message.nicce 3y agoNot in Gmail, but for example, in Google Cloud webui.jcpst 3y agoSame. I even use gmail in the browser on Firefox/iOS, and all it does is give me a splash page saying the app is better, then I click through.