What does زر تسجيل look like on Facebook?

On Facebook it is the design shipped in 16.0, shown above at full size. Older revisions are listed beneath it.

When did Facebook add زر تسجيل?

Facebook first drew زر تسجيل in 2.0, released 20 فبراير 2017.

Meta Platforms, Inc. has shipped 12 versions of زر تسجيل. Each is dated, so you can see when the design changed.

Facebook 2.2

This is the design Facebook introduced in 2.0, shipped again unchanged. It was not redrawn for this release.

✳ marks a release that redrew this emoji. The rest re-shipped the design unchanged.

What does زر تسجيل look like on Facebook?: On Facebook it is the design shipped in 16.0, shown above at full size. Older revisions are listed beneath it.
When did Facebook add زر تسجيل?: Facebook first drew زر تسجيل in 2.0, released 20 فبراير 2017.
How many times has Facebook redrawn زر تسجيل?: Meta Platforms, Inc. has shipped 12 versions of زر تسجيل. Each is dated, so you can see when the design changed.