Nautilus python extension: Copy Path context menu action. Basically just because Firefox doesn't have that ready in Download manager so you have to go `Right click > Show in folder > Right click > Copy path`

copy_path.py

from gi.repository import GObject, Nautilus
import subprocess


class CopyPathExtension(GObject.GObject, Nautilus.MenuProvider):
    def menu_activate_cb(self, menu, files):
        paths = [f.get_location().get_path() for f in files]
        text = "\n".join(paths)
        subprocess.run(["wl-copy"], input=text.encode(), check=True)

    def get_file_items(self, *args):
        files = args[-1]
        item = Nautilus.MenuItem(
            name="CopyPathExtension::CopyPath",
            label="Copy Path",
            tip="Copy full file path",
        )
        item.connect("activate", self.menu_activate_cb, files)
        return [item]

    def get_background_items(self, *args):
        return []