How to get the same behavior of the URL address bar on Linux as on Firefox for Windows. I mean the whole URL gets selected by first click and unselected with cursor position where second click was made. Is there any way to do that?
Yes, you can do that. Write in the address bar
about:config and press enter. Accept the warning. Then in the search bar you will now see above your settings type
click - that will open click related settings. Choose
browser.urlbar.clickSelectsAll and set it's value to
true. From now the new tabs windows you open will show this behaviour you want.