Firefox will not open old tabs

My computer crashed last evening and on restarting firefox, it goes to a new page without any of the old tabs available. Going under history has all of the options regarding restoring recently closed windows greyed out.
I did confirm that under preferences it is set to open previous tabs on starting firefox.
I have had the sessionstore.js file get corrupted previously. Looking in the profile folder showed the sessionstore.js to be a 1k file. So my first instinct was to just restore that file, and fortunately, there is a sessionstore.bak file with a time late last PM, so that file should still contain my last session.
I made a copy of the sessionstore.bak file and renamed it to sessionstore.js, but firefox still opens with a fresh session. I had the windows explorer (i.e. file manager) window open and as firefox was starting, the sessionstore.js got clobbered back to a 1k file suggesting the firefox is clearing the last session on opening. I tried restoring sessionstore.js from sessionstore.bak another time and making sessionstore.js read only, but firefox still will not revert back to the previous browsing session; instead it creates a new file called sessionstore.js.tmp.
I'm at a loss as to how to get my old browsing session back. I'm still using firefox V28.0. I haven't upgraded to V29 due to not wanting to lose the ability to export tabs as reported in the reviews of the android version of V29. Operating system is Win 7 SP1.

If Firefox won't read the file when it's named sessionstore.js, it may have a structural problem. In that case, a little surgery might be needed, but it's hard to know what to suggest without more information.
Could try one of the data mining techniques in these posts to rescue the URLs from the sessionstore.js or sessionstore.bak file:
* Using Firefox's Browser Console (formerly known as Error Console): https://support.mozilla.org/questions/969046#answer-471950
* Using Firefox developer tool "Scratchpad": http://forums.mozillazine.org/viewtopic.php?f=38&t=622036&start=60&p=12098147#p12098147
* Using a third party website: https://firefox-session-restore.herokuapp.com/

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*[[/questions/880050]]

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y2ken wrote:
You can try the Firefox web browser to see if you can then connect. Firefox is a better, faster, more secure browser anyway and will prompt you to transfer all your Favorites from IE.
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Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.

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Firefox will not open old tabs

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