Simplenote add-on is not found !! Rated 4 out of 5 stars

QFN's add-on list page can be found in "Firefox Add-ons by InBasic"
and in this add-on list also can be found
"Title: Simplenote tweak - - - - Download and discussion: here "
This "here" is link as
looked like other add-on' s descriptions.
But, I clicked to open the link, then showed it below
The requested topic does not exist.",
seems like auto-reply message by the host server.
Where is the "Simplenote tweek" QFN-extention?

This review is for a previous version of the add-on (