Description: This issue seems to only occur on the first session of email after initial set up - that sharing to email will fail to create a new message but instead takes user to email app inbox. STR: 0) Email app has not been utilized after flashing 1) Open email app, set up an account, and proceed to inbox 2) Do NOT kill the email app. Return to homescreen. 3) Open browser and access youtube.com 4) Tap into any video > tap the share icon > select Email Expected: Email app is launched with a new email pre-filled with relevant information one wants to share Actual: Email app is launched looking at inbox and no other action. The expected behavior will be shown if I kill email app and relaunch it. Repro frequency: 5/5 Video demonstrating the issue: https://www.youtube.com/watch?v=SJuCoOrzbKE Device: Aries 2.5 BuildID: 20150826051728 Gaia: c1ae9f02f2a9cfb89bf67aeea97e467c41c3362c Gecko: f61c3cc0eb8b7533818e7379ccc063b611015d9d Gonk: 2916e2368074b5383c80bf5a0fba3fc83ba310bd Version: 43.0a1 (2.5) Firmware Version: D5803_23.1.A.1.28_NCB.ftf User Agent: Mozilla/5.0 (Mobile; rv:43.0) Gecko/43.0 Firefox/43.0 Device: Flame 2.5 BuildID: 20150826030209 Gaia: c1ae9f02f2a9cfb89bf67aeea97e467c41c3362c Gecko: f61c3cc0eb8b7533818e7379ccc063b611015d9d Gonk: c4779d6da0f85894b1f78f0351b43f2949e8decd Version: 43.0a1 (2.5) Firmware Version: v18Dv4 User Agent: Mozilla/5.0 (Mobile; rv:43.0) Gecko/43.0 Firefox/43.0

This issue does NOT occur on Flame 2.2. User is correctly taken to compose a new email with title and email body filled with information they want to share. Device: Flame 2.2 BuildID: 20150826032503 Gaia: 335cd8e79c20f8d8e93a6efc9b97cc0ec17b5a46 Gecko: 1effc4cb6414 Gonk: bd9cb3af2a0354577a6903917bc826489050b40d Version: 37.0 (2.2) Firmware Version: v18D-1 User Agent: Mozilla/5.0 (Mobile; rv:37.0) Gecko/37.0 Firefox/37.0

[Blocking Requested - why for this release]: Regression of email functionality. Let's get a window.

This is another symptom of bug 1176829. From the logcat (thanks for providing it!): [31mERR: onerror reporting: TypeError: this.backButton is undefined @ app://email.gaiamobile.org/js/cards/setup_account_info.js : 29 Same as bug 1180929, already duped to bug 1176829