How to make address and awesome bar not auto-expand?

I'm looking to customize firefox's appearance. I want two rows: one with the menu button, tabs, and awesome bar (in that order), and another with the forward/back buttons, address bar, home button, and bookmarks toolbar items (also in that order).

In both cases, the address bar and the awesome bar expand to fill all of the empty space (ei. my awesome bar starts spanning almost the entire row) and shrink as more items are added (ei. as I open more tabs). I would like to make it so they have a set size.

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