Firefox Addressbar Select-on-click
In Windows, clicking on the addressbar in Firefox selects the existing URL so you can type to replace or paste to replace.
In FreeBSD, clicking on the addressbar doesn’t do that. However, when you manually select the URL so you can replace it, it overwrites the contents of your clipboard and makes it so much harder to paste the URL you were about to look at.
Luckily, you can fix this :) Browse to about:config and stick urlbar in the filter box. Find the browser.urlbar.clickSelectsAll setting and change it (by double-clicking) to true.
To paste, you’ll probably have best success with Ctrl-V as middlemouse seems to paste the clipboard without overwriting the previous contents.