User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:49.0) Gecko/20100101 Firefox/49.0 Build ID: 20161019084923 Steps to reproduce: FF 49.0.2 on OS X, also tried in Safe mode. 1. Goto https://www.mozilla.org/en-US/firefox/new/ 2. Select FF logo in top left and Copy Image 3. Open, say, TextEdit and paste Actual results: No image appears Expected results: The Firefox logo should be pasted in the document

Michael, can you take a look? I'm assuming this isn't a regression but if it is it should be higher than P3.

I asked jeff to download ESR and try the reproduction steps and the image pasting seemed to not work. This makes me think that it's not a regression.

QA, can you please determine if image copy/paste ever worked on OS X? Bug 1146715 at least indicates copying an animated GIF didn't work with 39 on OS X. Thanks!

I tried to find the regression with mozregression, but unfortunately the versions are too old and I couldn't find the exact build where this bug came from. I finally managed to narrow it down to this result. Firefox Regression Range Link Maker (http://bsmedberg.github.io/firefox-regression-range-finder/ -works only on Firefox-) doesn't work either. I'm guessing because of the same reason. Last good build: Nightly - 12.0a1 2012-01-04 First bad build: Nightly - 12.0a1 2012-01-05 I manually generated a pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=200a8d1fb452&tochange=10894668e37f I tested on releases first, then I started to test on Nighlty using Mac OS x 10.10.5. In conclusion, I would say that this is a regression, because at some point you could do this in Firefox.

Thank you, Oana! So it's a regression from a long time ago. We'll track this as something to fix.