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Adding some caveats
A number of our Windows users are seeing flash hangs on a regular basis. If you would like to help Mozilla's engineers diagnose and fix those problems for our users once and for all, please follow the process below.
A typical Flash hang happens when a movie or animation starts and Firefox becomes unresponsive , often for several seconds or minutesat a time.
== Getting Started ==
* Install a Windows tool called [https://technet.microsoft.com/en-us/sysinternals/bb896653.aspx Process Explorer]
* An up-to-date copy of Firefox. You can make sure your copy is up to date by looking in the Help menu, and selecting "About Firefox".
* An up-to-date-copy of Flash. (VERIFY THAT THIS IS WHAT WE WANT)
== Setting Up ==
* Set javascript.options.baselinejit to false
* Set javascript.options.ion to false
* If you are using Nightly, open your Preferences and make sure "Enable E10S (multiprocess)" is unchecked.
Once that's done, restart Firefox and start Process Explorer, and start browsing the internet as usual.
* there should be two FlashPlayerPlugin processes. You want the deeper (second) one - see the diagram below.
The "CPU Usage" column of thesee these processes should be zero, or close to itzero. If so, right-click on each of the three processes and choose Process -> Create Dump -> Create Full Dump, as in the picture below.
If the "CPU Usage" column is closer to 1, we're having a different problem; please [mailto:bsmedberg@mozilla.com?subject=Flash_CPU_1 email Benjamin Smedberg] at this point for clarification.
== Sending the Data to Mozilla ==
The dump files will be too large to email or add to Bugzilla. You'll need to upload them to Dropbox or Google Drive, and then share them with bsmedberg@mozilla.com. Please note that these files may contain personally identifiable information, including passwords.
Please note that these files may contain personally identifiable information including passwords. We will handle these dumps with a great deal of respect and care, and will not share them outside of Mozilla and -with your permission -- really our collaborating engineers at Adobe. We will not happy with that last bit - mhoye ---store or redistribute this data outside of Mozilla or outside of Mozilla's immediate requirements to resolve this issue. As well, Mozilla's copy of this data will be deleted as soon as it is no longer being used to investigate and resolve this issue, and you will be notified of this deletion.
Once you've done that, [http://goo.gl/forms/rMCgO5yelu please fill out the questions on this form].This form asks
Some of the information that form asks for will be in "about:support" - you can open about:support the same way you opened about:config earlier.
Once you have submitted that form, you're done! We hope that by solving this problem, the web will be a better experience for everyone, and Mozilla thanks you for your time and effort.
