It's innovator's dilemma. The same thing that made Mozilla popular ("advanced" add-ons) is what kept it from moving to the "dumb" Chrome extension model that Go

It's innovator's dilemma. The same thing that made Mozilla popular ("advanced" add-ons) is what kept it from moving to the "dumb" Chrome extension model that Google's browser adopted a long time ago. The older add-on model is what kept it from having better security and having less memory problems for so long.