I fully agree. Although some buttons might be hidden away a bit better, perhaps moved to about:config or have them trigger a warning, I love that Firefox has these features. I've used almost all of the mentioned features (including turning off images), so none of them are useless to me.
But 'Load images automatically' and Enable Javascript should not be those that are moved. I remember how a few years back I had to regularly uncheck the 'load images automatically' box just to get my slow like death internet load things that mattered. I'm sure there are many places in the world where people have to still deal with that regularly. Same goes with javascript - security, privacy for those who know how it might affect their normal browsing.
Disabling these on mobile is especially nice due to bandwidth costs and limitations. On Firefox for Android, images can be disabled by settings the permissions.default.image option to 2 in about:config. JavaScript can be toggled with the javascript.enabled option.
IIRC, Chrome for Android does not allow the user to disable image loading. Opera and Opera Mini do, and also allow the user to load images at lower quality. "Internet" (stock browser) does on my phone. Dolphin does.
