What is the Function of "Flexible Space"?

[BuddhaNature]

On install of Firefox 57.0 I found that there was what gets called "Flexible Space" to the left and right of the Address Bar. In the Customise interface I removed those Flexible Spaces". Now I'm wondering if that might cause a problem later on with addons or something.

So, could someone please explain the function of Flexible Space, what it gets used for? And what might happen if the user removes it - are there potential pitfalls to that?

[Frank Lion]

So, could someone please explain the function of Flexible Space, what it gets used for? And what might happen if the user removes it - are there potential pitfalls to that?

Did you just fall to Earth yesterday from the Planet Zog or something? Like on every other computer program, a flexible space just pushes the toolbar buttons, addressbar, etc. apart so that the stuff looks more balanced and spaced apart.

[BuddhaNature]

From Planet Zog: "Thanks very much, Frank!"