[1.Description]: [Flame v2.5][Music NGA]If there only a song in playlist, play the music and use "Next music" function(Tap the ">|" button), You will see the "Fast-forward " button is unavailable. See log:"logcat_0843.txt" See video:"Flame_v2.5.3GP" Found Time:08:43 [2.Testing Steps]: Precondition: There are some musics in device. 1. Launch "Music NGA". 2. Choose a track which only have one song in playlist. 3. Play the music. 4. Tap ">|" button on music control bar. [3.Expected Result]: 4. It should back to playlist view. [4.Actual Result]: 4. The ">|" button is unavailable. [5.Reproduction build]: Flame 2.5(Affected): Build ID 20150927150205 Gaia Revision 285486b417f1cb8316b19c0698a6655fc053fbd6 Gaia Date 2015-09-25 14:11:30 Gecko Revision https://hg.mozilla.org/mozilla-central/rev/6256ec9113c115141aab089c45ee69438884b680 Gecko Version 44.0a1 Device Name flame Firmware(Release) 4.4.2 Firmware(Incremental) eng.cltbld.20150927.184956 Firmware Date Sun Sep 27 18:50:08 EDT 2015 Firmware Version v18D v4 Bootloader L1TC000118D0 [6.Reproduction Frequency]: Always Recurrence,5/5 [7.TCID]: 2341

From the attached video, this was tested on a relatively old build. I just tested this again on master and it is no longer happening. Please re-open if you see this again. Thanks!