Here's the original extension:

* https://addons.mozilla.org/en-US/firefox/addon/old-layout-for-facebook/

shella is dishonest.

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* Release 3.0 is available on today (Sep. 28, 2020). Credit to the real developer Matt Kruse.

* Release 4.2 is available on today (Oct. 13, 2020). Credit to the real developer Matt Kruse.

* Release 5.1 is available on today (Oct. 20, 2020). Credit to the real developer Matt Kruse.

* Release 5.2 is available on today (Oct. 22, 2020). Credit to the real developer Matt Kruse.

* Release 6.4 is available on today (Oct. 23, 2020). Credit to the real developer Matt Kruse.

For more information:

https://oldlayout.com/update.html