@l4p1n in firefox: 1. open "about:config" 2. accept the big warning 3. right click -> New -> String 4. Name: general.useragent.override 5. Value: Godzilla/4.0 (owo) 6. Profit (you do not even have to restart firefox!)
Using the useragent-string of the Googlebot can be helpful on news-websites with the philosophy "We have a paywall but still want our articles to be found and thus don't block the Googlebot per robots.txt."