The webclipper does an ok job put it would be nice if the URL that was used to create the note was stored in the note too. A user can then select that URL to go to the original page.
it is already the case, see I grabbed the current page, then:
[foxmask@foxmask:~] 1m16s 1 $ joplin --profile ~/.config/joplin-desktop/ ls -l -n 1 -t n
c4591 15/09/2018 19:08 Feature request: Webclipper stores URL - Features
then I query the database
foxmask@foxmask:~] $ sqlite3 ~/.config/joplin-desktop/database.sqlite
SQLite version 3.16.2 2017-01-06 16:32:41
Enter ".help" for usage hints.
sqlite> select source_url from notes where id like 'c4591%';
https://discourse.joplin.cozic.net/t/feature-request-webclipper-stores-url/658
so the url is stored but not yet displayed in joplin. it’s a known feature request
Thanks for letting me know, lets hope one of the coming versions will show it.
That will be in the next desktop version 
and that will be great 