Comment 13 for bug 1304472

Tom, Alex & Sean, please follow this testing procedure and report results:

1) Prepare reference environment

Open Google Play Music in Firefox, Chromium or Chrome. Not in GNOME Web (Epiphany) or Midori.

Address: https://play.google.com/music

Click gear icon at the top right corner, click "Labs" menu item to open Labs settings and turn off
all features. Note: If you have Chromecast enabled, you have to use Chromium or Chrome browser
to disable it.

Open terminal window and type following command. This will temporarily disable all web plugins.

sudo mv /usr/lib/mozilla/plugins /usr/lib/mozilla/disabled-plugins

Install Nuvola Player from Unstable builds PPA.

Instructions: http://nuvolaplayer.fenryxo.cz/help/installation.html#ubuntu

2) WebKitGtk test

Run webkitgtkframe tool in terminal and report whether the issue is reproducible.

/usr/libexec/nuvolaplayer/webkitgtkframe https://play.google.com/music

3) WebKit2Gtk test

Install a package libwebkit2gtk-3.0-25, run WebKit2Gtk MiniBrowser and report whether the issue
is reproducible.

/usr/lib/x86_64-linux-gnu/webkit2gtk-3.0/libexec/MiniBrowser https://play.google.com/music

4) Nuvola Player test

Check whether the issue is reproducible in Nuvola Player.

5) Re-enable plugins

Open terminal window and type following command. This will re-enable all web plugins.

sudo mv /usr/lib/mozilla/disabled-plugins /usr/lib/mozilla/plugins

You might also want to re-enable experimental features from Labs