A quick search turned up this for me: https://blog.mozilla.org/firefox/the-new-firefox-by-the-numbers/ https://blog.mozilla.org/firefox/the-new-firefox-by-the-n

A quick search turned up this for me: https://blog.mozilla.org/firefox/the-new-firefox-by-the-numbers/ https://blog.mozilla.org/firefox/the-new-firefox-by-the-numb... It's a bit dated, but at the time of the Quantum release, > How many authors contributed code? > More than 700 authors contributed code to Firefox ... and I guess the majority of those code authors were working for Mozilla. It seems unlikely there's been a 90% reduction in the engineering effort being put into Firefox in the last couple years.