subequent kills to kill ring integration. Is it possible?

[Paul K]

Hallo emacs users.

When I mark some text in a browser (firefox), then copy it with C-c, I can
paste it to emacs buffer with C-y. This is fine.

But when I do  "mark + C-c" serveral times in firefox, then only last mark
can be retrieved into emacs buffer, ie. earlier markings are not accessible
by subsequent yank-pop (M-c).

Is there a way to get them?

best regards