[1.Description]: [Flame 3.0][Nexus 5 3.0][Gaia:Loop]After you install Loop in device, use Firefox account to log in, but you can't login successfully, and it prompts you there is login failure. Loop versions: bd8f1c2 Found time: 10:55 See attachment: 1055.3gp and logcat_1055.txt [2.Testing Steps]: Prerequisite: You have log in Firefox account in Settings. 1.Install Loop to device. 2.Launch Loop. 3.Select Firefox account. 4.Tap the settings icon in log in failure prompt view. 5.Drag down the notification, then tap the back icon to back log in fail page. [3.Expected Result]: 3.User acn log in Firefox account in Loop successfully. 4.If it fails to log in the account, then we tap the settings icon to enter settings view, all content should display normally. 5.When you tap the back icon, device should back to previous page. [4.Actual Result]: 3.User can't login Firefox account in the Loop, and it prompts "Sorry, due to problems on our side your account session has expired. Please try logging in again. If the problem persists, you might need to log out from Firefox Accounts on the Settings App.". 4.The settings view can't display any content. 5.Sometimes, tap the back icon, device can't back to previous page. [5.Reproduction build]: Device: Flame 2.2 version(Unaffected): Build ID 20150616002505 Gaia Revision e7a0c6d5f4df04d45fb3f726efb9e8223600cb79 Gaia Date 2015-06-15 06:12:18 Gecko Revision https://hg.mozilla.org/releases/mozilla-b2g37_v2_2/rev/8045028bf400 Gecko Version 37.0 Device Name flame Firmware(Release) 4.4.2 Firmware(Incremental) eng.cltbld.20150616.035412 Firmware Date Tue Jun 16 03:54:24 EDT 2015 Bootloader L1TC000118D0 Device: Flame 3.0 version(Affected): Build ID 20150616010205 Gaia Revision 62ba52866f4e5ca9120dad5bfe62fc5df981dc39 Gaia Date 2015-06-15 19:09:24 Gecko Revision https://hg.mozilla.org/mozilla-central/rev/ce863f9d8864 Gecko Version 41.0a1 Device Name flame Firmware(Release) 4.4.2 Firmware(Incremental) eng.cltbld.20150616.060924 Firmware Date Tue Jun 16 06:09:36 EDT 2015 Bootloader L1TC000118D0 Device: Nexus 5_2.2 version(Unaffected): Build ID 20150616002505 Gaia Revision e7a0c6d5f4df04d45fb3f726efb9e8223600cb79 Gaia Date 2015-06-15 06:12:18 Gecko Revision https://hg.mozilla.org/releases/mozilla-b2g37_v2_2/rev/8045028bf400 Gecko Version 37.0 Device Name hammerhead Firmware(Release) 5.1 Firmware(Incremental) eng.cltbld.20150616.034849 Firmware Date Tue Jun 16 03:49:07 EDT 2015 Bootloader HHZ12d Device: Nexus 5_3.0 version(Affected): Build ID 20150616160206 Gaia Revision 9d42e94446f2dc01b519172b6d75d81d4d435bdc Gaia Date 2015-06-16 16:16:47 Gecko Revision https://hg.mozilla.org/mozilla-central/rev/27caa5299f9f Gecko Version 41.0a1 Device Name hammerhead Firmware(Release) 5.1 Firmware(Incremental) eng.cltbld.20150616.193221 Firmware Date Tue Jun 16 19:32:40 EDT 2015 Bootloader HHZ12f [6.Reproduction Frequency]: Always Recurrence,5/5 [7.TCID]: Free Test [8.Note]: If you log in Firefox account in Loop, the bug still exists. As the same account can be logged into Loop successfully on Flame 2.2 and Nexus-5 2.2 device.