I-Firefox Isithangami Sokwesekwa

I have found a few pages about address rewriting; how do I disable them all ? - searching single word into google (type "keyw" in about:config to disable it) - hiding http when not using https - trying to add "www" and ".com" around a single word when the word did not resolve

I consider most of them as security issues for various reasons.

And when editting an URL, I want firefox to keep showing the full url as it was invoqued; not add https randomly, or removing http other days. And the more I disable some, the more new ones appear.