User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0 Build ID: 20170621102301 Steps to reproduce: Use the 'About Nightly' dialog to check for update. If available, click the button to install update. ----- Name: Firefox Version: 56.0a1 Build ID: 20170621102301 Update Channel: nightly User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0 OS: Windows_NT 10.0 Multiprocess Windows: 1/1 (Enabled by default) Google Key: Found Mozilla Location Service Key: Found Safe Mode: false ----- Actual results: Clicking on the update button did not install the update; Nightly did closed, but did not restart automatically. Upon inspecting 'Task Manager', discovered that there is a 'Nightly' process still running. Task manager's 'End Task' had to be used to kill the Nightly process. If 'Task Manager' was inspected right after clicking on update button, one or more processes of Nightly and one process of updater were seen. If Nightly process is killed while updater process is still running, the update happens and Nightly launches automatically after the update is installed. This is the workaround I am using at the moment. I've noticed this behavior for a few weeks now. Expected results: Normally, when update button is clicked, Nightly should close, Nightly should be updated, updated Nightly should launch automatically.

I've changed the updater in Bug 1375549 so it will apply the update anyways so if there is a fix for the Firefox (other applications as well) process not exiting the client will get the fix and to not try to launch Firefox (other applications as well) when the process hasn't exited. This should merge into Nightly in a couple of days. The issue with Firefox (other applications as well) will need to be fixed in Bug 1375242 so I am duplicating this bug to that bug. The developers working on bug 1375242 need additional information per bug 1375242 comment #2 so if you can help provide that information it would be helpful. Thanks!

I didn't managed to reproduce the issue with the stated build in comment 0 (Firefox 56.0a1 from 2017-06-21). I managed to reproduce this issue with Firefox 56.0a1 from 2017-06-28 (as stated in bug 1377441) but the actual result is slightly different: Same results with reporter: Firefox Nightly doesn't automatically restarts after update. Different result: The Nightly processes are killed and are no longer visible in task manager. Note: This issue is not reproducible while updating Firefox Nightly from 2017-07-15 to the current version

(In reply to Emil Ghitta, QA [:emilghitta] from comment #2) > I didn't managed to reproduce the issue with the stated build in comment 0 > (Firefox 56.0a1 from 2017-06-21). > > I managed to reproduce this issue with Firefox 56.0a1 from 2017-06-28 (as > stated in bug 1377441) but the actual result is slightly different: > > Same results with reporter: > Firefox Nightly doesn't automatically restarts after update. > > Different result: > The Nightly processes are killed and are no longer visible in task manager. > > Note: > This issue is not reproducible while updating Firefox Nightly from > 2017-07-15 to the current version What you experienced was bug 1376612 which is a regression and has a different cause than what the reporter experienced.

Based on comment 3, I am failing to reproduce this. Mahesh, can you still reproduce this with a more recent nightly ? (ex: Nightly from 2017-07-15). Thanks!

(In reply to Emil Ghitta, QA [:emilghitta] from comment #4) > Based on comment 3, I am failing to reproduce this. > > Mahesh, can you still reproduce this with a more recent nightly ? (ex: > Nightly from 2017-07-15). > > Thanks! Just tried Nightly update, it went as expected. I did not have to kill nightly process. Seems like the bug is fixed.