FF 21.0 Unresponsive after Sleep - Windows 7.0

Ok, this problem has been going on with a number of FF users since FF 8.0 (and possibly earlier). I have yet to see a suggested response that actually cures the problem, and the fact that the issue still persists in the current release tells me that it has not been addressed by the developer.
I'm running Windows 7 and consistently, after waking up from sleep, FF is completely unresponsive. The only solution I have found that works is to terminate the program completely and restart it.
Others have suggested Resetting FF, rebooting the system in Safe Mode etc - NONE of these suggestions cure the problem. I have tried disabling plugins and various other methods to know avail.
After much testing, it is my belief that the issue has to do with the way FF handles running javascript and that FF is unable to recover from sleep mode and start these javascripts again - just a theory.
This is a very common issue, and I can replicate it across other PCs as well as those running under XP SP3.
I'm interested in hearing actual solutions to this issue from people who have experienced it and resolved it, not best guess stabs in the dark about things to try (and please, if all you have to add is "I'm having this problem too", it's really better not to respond - I already know that a lot of people are dealing with this problem, so simply adding your name to the list isn't going to help).
Thanks,
RadioActive1

For me, this problem began after I installed Windows important updates released 5/14/13. When I ran system restore to a date prior to installation of those updates, the problem was gone.
So I installed each update, one at a time, with a few days between each, and found the problem began again right after install of Update for Windows 7 for x64-based Systems (KB2798162).
I ran system restore to the save point prior to installation of KB2798162, and problem is gone.
Update KB2798162 "improves messaging of dialog boxes when you run executable files in Windows". I think I can live without this update for now, rather than deal with the unresponsive-firefox-after-sleep aggravation.

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    CPU Utilization:Individual process with significant processor utilization.
    This process is responsible for a significant portion of the total processor utilization recorded during the trace.
    Process Name
    System
    PID
    4
    Average Utilization (%)
    0.65
    Module
    Average Module Utilization (%)
    \SystemRoot\system32\hal.dll
    0.35
    \SystemRoot\system32\DRIVERS\athrx.sys
    0.18
    \SystemRoot\system32\ntoskrnl.exe
    0.06
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    Platform Timer Resolution:Platform Timer Resolution
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    Current Timer Resolution (100ns units)
    156000
    Power Policy:Active Power Plan
    The current power plan in use
    Plan Name
    Custom
    Plan GUID
    {49ef8fc0-bb7f-488e-b6a0-f1fc77ec649b}
    Power Policy:Power Plan Personality (Plugged In)
    The personality of the current power plan when the system is plugged in.
    Personality
    Balanced
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    Quality Mode
    Optimize for Video Quality
    System Availability Requests:Analysis Success
    Analysis was successful. No energy efficiency problems were found. No information was returned.
    Battery:Analysis Success
    Analysis was successful. No energy efficiency problems were found. No information was returned.
    Platform Power Management Capabilities:Supported Sleep States
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    S1 Sleep Supported
    false
    S2 Sleep Supported
    false
    S3 Sleep Supported
    true
    S4 Sleep Supported
    true
    Platform Power Management Capabilities:Processor Power Management Capabilities
    Effective processor power management enables the computer to automatically balance performance and energy consumption.
    Group
    0
    Index
    0
    Idle (C) State Count
    3
    Performance (P) State Count
    10
    Throttle (T) State Count
    0
    Platform Power Management Capabilities:Processor Power Management Capabilities
    Effective processor power management enables the computer to automatically balance performance and energy consumption.
    Group
    0
    Index
    1
    Idle (C) State Count
    3
    Performance (P) State Count
    10
    Throttle (T) State Count
    0
    Platform Power Management Capabilities:Processor Power Management Capabilities
    Effective processor power management enables the computer to automatically balance performance and energy consumption.
    Group
    0
    Index
    2
    Idle (C) State Count
    3
    Performance (P) State Count
    10
    Throttle (T) State Count
    0
    Platform Power Management Capabilities:Processor Power Management Capabilities
    Effective processor power management enables the computer to automatically balance performance and energy consumption.
    Group
    0
    Index
    3
    Idle (C) State Count
    3
    Performance (P) State Count
    10
    Throttle (T) State Count
    0
    Platform Power Management Capabilities:Processor Power Management Capabilities
    Effective processor power management enables the computer to automatically balance performance and energy consumption.
    Group
    0
    Index
    4
    Idle (C) State Count
    3
    Performance (P) State Count
    10
    Throttle (T) State Count
    0
    Platform Power Management Capabilities:Processor Power Management Capabilities
    Effective processor power management enables the computer to automatically balance performance and energy consumption.
    Group
    0
    Index
    5
    Idle (C) State Count
    3
    Performance (P) State Count
    10
    Throttle (T) State Count
    0
    Platform Power Management Capabilities:Processor Power Management Capabilities
    Effective processor power management enables the computer to automatically balance performance and energy consumption.
    Group
    0
    Index
    6
    Idle (C) State Count
    3
    Performance (P) State Count
    10
    Throttle (T) State Count
    0
    Platform Power Management Capabilities:Processor Power Management Capabilities
    Effective processor power management enables the computer to automatically balance performance and energy consumption.
    Group
    0
    Index
    7
    Idle (C) State Count
    3
    Performance (P) State Count
    10
    Throttle (T) State Count
    0

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