Please help me figure out why Firefox is hanging - with problem signature

Hi, I am having a repetitive issue with Firefox where it just freezes up ("not responding). Most of the time it never responds and I have to just shut it all down and restart. When I do this, even though I click the option to check for a solution and close the program, it thinks for a second and gives me the following "problem signature" but it doesn't inform me of any solution. Here is what it usually says:
Problem signature:
Problem Event Name: APPCRASH
Application Name: plugin-container.exe
Application Version: 31.0.0.5310
Application Timestamp: 53c75e91
Fault Module Name: mozalloc.dll
Fault Module Version: 31.0.0.5310
Fault Module Timestamp: 53c72e91
Exception Code: 80000003
Exception Offset: 0000141b
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789
**Except this last time, it instead said:
Description:
A problem caused this program to stop interacting with Windows.
Problem signature:
Problem Event Name: AppHangB1
Application Name: firefox.exe
Application Version: 31.0.0.5310
Application Timestamp: 53c75e72
Hang Signature: 6fe5
Hang Type: 0
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033
Additional Hang Signature 1: 6fe5a46c27c960d6794641adcb9f9725
Additional Hang Signature 2: 3ecb
Additional Hang Signature 3: 3ecb099458780b94b15832cd5ce3bb6a
Additional Hang Signature 4: 6fe5
Additional Hang Signature 5: 6fe5a46c27c960d6794641adcb9f9725
Additional Hang Signature 6: 3ecb
Additional Hang Signature 7: 3ecb099458780b94b15832cd5ce3bb6a
Then a box pops up and says "Plugin container for firefox has stopped working" and the problem signature is:
Problem Event Name: APPCRASH
Application Name: plugin-container.exe
Application Version: 31.0.0.5310
Application Timestamp: 53c75e91
Fault Module Name: mozalloc.dll
Fault Module Version: 31.0.0.5310
Fault Module Timestamp: 53c72e91
Exception Code: 80000003
Exception Offset: 0000141b
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e78
At this point firefox totally shuts down and does not restart unless I open it again. When this happens I get the "this is embarrassing" screen where I can uncheck or leave checked what I want to be restored. I will point out that I usually have a few windows and multiple tabs in each window open at any given time. I don't know if this factors into it because I never only have one window or tab open to compare it to. I also generally leave them open even when I close my laptop so basically they stay open until the next time is crashes. Maybe this is the issue? Not sure. I also sometimes get an error type message about a script not working right. The most recent one is:
"Script: chrome://global/content/bindings/tabbox.xml:734"
I only use Firefox generally, browser-wise. I am using IE to post this because Firefox just keeps freezing and when I try to restart it and re-open the previous windows I had open, it freezes again. I do not have Chrome or any other browser installed. I love Firefox!
Thank you for any help you can provide. I skipped over some of the recommendations that are generally suggested before posting a question but they all would have involved scrapping the many tabs I have open and then I would lose all of them because they aren't bookmarked. I hope that doesn't sound really stupid. I'm (obviously) not super technically inclined when it comes to the internet. Thanks again for reading this and I would very much appreciate any input.
Oh and I am using Windows 7 and I think the Firefox version is 31.0
Thanks!!!!

Try to create a new profile as a test to check if your current profile is causing the problem.
See "Creating a profile":
*https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues
If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

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