The app Owen mentioned is Hush - Noiseless Browsing: https://oblador.github.io/hush/
The book Gemma received for her birthday was Word Perfect by Susie Dent, available from all good booksellers.
Ross Garner referenced the calorie-burning prowess of chess grandmasters: https://www.espn.co.uk/espn/story/_/id/27593253/why-grandmasters-magnus-carlsen-fabiano-caruana-lose-weight-playing-chess
He also talked about Cloudflare's novel approach to data encryption: https://www.atlasobscura.com/places/encryption-lava-lamps
And made up some stuff about Rasputin, which is corrected here: https://en.wikipedia.org/wiki/Grigori_Rasputin
Ross Dickie made some less dubious Rasputin-related claims about the origins of 'this is a work of fiction' movie disclaimers: https://slate.com/culture/2016/08/the-bizarre-true-story-behind-the-this-is-a-work-of-fiction-disclaimer.html