And then people would complain about Firefox being bloated with all these built-in extensions. And then if you don't pre-install them people will complain about needing to add all of these extra extensions.

They right clicked on an image which is also a clickable link which adds the additional options for both links and images, a total of 11, to the defaults.

There would still be decidedly fewer complaints, because extensions are vastly easier to manage and disable or remove than this long list of about:config settings. The fact that you cannot satisfy everybody simultaneously cannot be an excuse for failing to ship with sensible defaults and easy, discoverable customization.

Indeed, and this argument ("it will be too bloated") is often used by developers themselves to avoid (or hide) advanced features. I never quite understood it. Just put all the mysterious flags behind an "Advanced" menu, which normie users will know not to touch.