Change 208668 had a related patch set uploaded (by Dbrant):
Fix sharing of images to Facebook app.

https://gerrit.wikimedia.org/r/208668

Change 208668 merged by jenkins-bot:
Fix sharing of images to Facebook app.

https://gerrit.wikimedia.org/r/208668

Checked with 2.0.101-alpha-2015-05-05 - seems to be working.

For some reason, it's very, very slow - most likely unrelated to Wiki apps. But mayve some day we can do a thorough testing?
Couple of problems

• if Facebook is not responsive, it takes a really long time to display a message to a user
• if a user is not logged in, it's also takes a long time for a Facebook to respond with "you're not logged in..."

I'd like some input from Design of what priority for a user is that functionality.

@Etonkidova
Thank you for your notes. This has come up before.
There is a long delay and the error messaging is not intuitive.
Unfortunately, we can't do too much here. The messaging seems to be controlled by fb/twitter.

Signed off by Design