Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Èròjà atẹ̀lélànà yii ni a ti fi pamọ́ fọ́jọ́ pípẹ́. Jọ̀wọ́ béèrè ìbéèrè titun bí o bá nílò ìrànwọ́.

sessionstore.js not working?

  • 3 àwọn èsì
  • 14 ní àwọn ìṣòro yìí
  • 1 view
  • Èsì tí ó kẹ́hìn lọ́wọ́ Soots

more options

I usually uses Task Manager to close off FF and then Restore Previous Session when it get really slow due to my crappy computer. But this time the option for Restore didn't pop up.

And copying the upgrade.js and rename it into sessionstore.js don't work either, the restored session is now the start up FF page, it doesn't make sense that there is only one page since the upgrade.js file is pretty heavy (10MB), I have tried using all the other big files in the sessionstore-backups folder but none of them works.

I plan to reinstall FF and then use the rename method again to see if it works but want to ask the forum first if anybody can help.

I usually uses Task Manager to close off FF and then Restore Previous Session when it get really slow due to my crappy computer. But this time the option for Restore didn't pop up. And copying the upgrade.js and rename it into sessionstore.js don't work either, the restored session is now the start up FF page, it doesn't make sense that there is only one page since the upgrade.js file is pretty heavy (10MB), I have tried using all the other big files in the sessionstore-backups folder but none of them works. I plan to reinstall FF and then use the rename method again to see if it works but want to ask the forum first if anybody can help.

Ọ̀nà àbáyọ tí a yàn

It IS the jsonlz4 file that is causing the trouble, since I manages to get half of my sessions back after delete all the jsonlz4 files in both the profile and session backup folder.

Ka ìdáhùn ni ìṣètò kíkà 👍 3

All Replies (3)

more options

So I decided to delete the sessionstore.js file, opened up FF and went to a bunch of sites, then exit the browser, opened it again, the previous session are now those sites.

But I discovered that FF doesn't seem to create a sessionstore.js file in the profile folder so of course me renaming and pasting those 10MB files didn't work.

Does the new version of Firefox change how Restore Previous Session works? The previous sessions still work so there have to be a file somewhere for FF to access.

more options

Okay, the new version Firefox is definitely ignoring the sessionstore.js file since I just notice that after I exit FF, there is a new file called sessionstore.jsonlz4...

more options

Ọ̀nà àbáyọ Tí a Yàn

It IS the jsonlz4 file that is causing the trouble, since I manages to get half of my sessions back after delete all the jsonlz4 files in both the profile and session backup folder.