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Firefox Nightly for Android 130 and new navigation bar
(lemmy.dbzer0.com)
With the version 130, Mozilla introduces a new navigation bar in Firefox for Android. If you don't like it, you can disable it in the "Secret Settings".
I was not a fan when it popped out on my screen. But, after sometime, it's pretty useful and saves a tap on the three dots button.
I don't know if that's the final design, nor if they plan to make it universal (applies on both new and old design) later on. Probably worth looking into, I'm not a fan and would rather be able to use any design with the full URL.