This unfortunately never got into the release branch. We have fixed this in bug 1123506 and we need to wait for it to hit release. You can have this work from Beta -> Nightly.
Status: UNCONFIRMED → RESOLVED
Closed: 3 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 1123506
It doesn't work with 48.0a1 which comes from firefox-nightly COPR repo. I'll try again later. It's a shame that FirefoxDriver is broken (forever?) and MarionetteDriver is broken (for a little while I hope) at the same time.
You need to log in before you can comment on or make changes to this bug.