Needing help tinkering with Firefox browser 67.0 (Buttons Issue)

I have just figured out how to move the buttons for my add-ons to underneath the the main buttons area. Which makes my browser look a bit more organized and clean. But I still have problems with the buttons that are inside the main search bar. Like the "Toggle Reader View" and the "spacer" and the "..." button as well. I also have a issue with the minimize, maximize and close buttons also. If I could make them transparent that would be great.

But I don't know how to do this.

If anyone has any ideas please let me know. Plus is there a way to change the color of the lock on the browser also mine is green currently. And dose not match the theme at all.

I did remove the read icon but I did leave the ... where it was. I would like to change the 3 top buttons. I would like to try and make them transparent if possible. But for now I kind of like it. I don't know much about editing the css so I will leave the ... for now.

Dawn121988 said:

I did remove the read icon but I did leave the ... where it was. I would like to change the 3 top buttons. I would like to try and make them transparent if possible. But for now I kind of like it. I don't know much about editing the css so I will leave the ... for now.

Fair enough.
You won't be able to create/modify .css stylesheets until Firefox 69.0 anyway, and that's if they keep the feature!

It is possible in Firefox Nightly Version 69...

Auto-hide Bookmarks Bar, hide buttons except on mouseover, etc...
Makes for a nice clean UI.