Try reseting all browser.sessionstore settings in about:config. You can access it by typing "about:config" in the adress bar and searching for "browser.sessionstore". Then right-click on all values displayed in bold text and choose Reset.
I had the same issue IIRC, but I tried several things and don't remember
exactly which one worked...
- [Trisquel-users] Abrowser: Not Retaining Windows and Tab... tesseract
- Re: [Trisquel-users] Abrowser: Not Retaining Window... tesseract
- Re: [Trisquel-users] Abrowser: Not Retaining Window... martin . racak
- Re: [Trisquel-users] Abrowser: Not Retaining Window... tesseract
- Re: [Trisquel-users] Abrowser: Not Retaining Window... martin . racak
- Re: [Trisquel-users] Abrowser: Not Retaining Window... mikko . viinamaki
- Re: [Trisquel-users] Abrowser: Not Retaining Window... tesseract
- Re: [Trisquel-users] Abrowser: Not Retaining Window... martin . racak
- Re: [Trisquel-users] Abrowser: Not Retaining Window... tesseract
- Re: [Trisquel-users] Abrowser: Not Retaining Window... tesseract
- Re: [Trisquel-users] Abrowser: Not Retaining Window... mikko . viinamaki
- Re: [Trisquel-users] Abrowser: Not Retaining Window... tesseract
- Re: [Trisquel-users] Abrowser: Not Retaining Wi... mikko . viinamaki
- Re: [Trisquel-users] Abrowser: Not Retaining Window... tesseract
- Re: [Trisquel-users] Abrowser: Not Retaining Window... tesseract