What does Bouton Retour look like on Mozilla?

On Mozilla it is the design shipped in Firefox OS 2.5, shown above at full size. Older revisions are listed beneath it.

When did Mozilla add Bouton Retour?

Mozilla first drew Bouton Retour in Firefox OS 2.5, released 30 janvier 2016.

Mozilla Foundation has shipped 1 version of Bouton Retour. Each is dated, so you can see when the design changed.

Mozilla

Mozilla Foundation has drawn Bouton Retour once. Every revision Mozilla has shipped is below, newest first.

What does Bouton Retour look like on Mozilla?: On Mozilla it is the design shipped in Firefox OS 2.5, shown above at full size. Older revisions are listed beneath it.
When did Mozilla add Bouton Retour?: Mozilla first drew Bouton Retour in Firefox OS 2.5, released 30 janvier 2016.
How many times has Mozilla redrawn Bouton Retour?: Mozilla Foundation has shipped 1 version of Bouton Retour. Each is dated, so you can see when the design changed.