There were plenty of technical reasons at the time, remember Firefox/Mozilla devs were strongly against the multiple processes model that Chrome devs really wan

There were plenty of technical reasons at the time, remember Firefox/Mozilla devs were strongly against the multiple processes model that Chrome devs really wanted. Chrome has redefined what it means to build a secure browser and I'm happy this is getting adopted now. Ofc, in the meantime Chrome isn't just a better technical alternative to existing browsers anymore, it's a strategic asset with all that entails.