How can I make firefox quit rearrainging tiles in new tab?

Each time I get my tiles arraigned the way I want them, firefox screws them up, re-arraigning them in ways I don't want, and adding ones I do not want and did not ask to be displayed on a new tab.

And while I'm at it, QUIT re-arraigning things in the settings. I used to be able to find passwords and other settings without having to search for them. All you're doing is arraignment the chairs on the Titanic! Each time I get used to particular settings, you guys come in and decide to screw things up, changing them in ways that few if anyone asked to have changed up. STOP IT!