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

Firefox REFUSES to save tabs and tabgroups on exit.

more options

I closed Firefox after yet another succesfull browsing session. Then when I opened it I only got this:

The address isn't valid


The URL is not valid and cannot be loaded.

Even if I try to restore the firefox session by replacing the "sessionstore" in Appdata/roaming/Mozilla/firefox/profiles it only rewrites it to 2KB from 5138KB. It just dont want to open my tabs, and all my tab Groups have disappeared.

And no, I don't run it in Metro.

I closed Firefox after yet another succesfull browsing session. Then when I opened it I only got this: <h1>The address isn't valid</h1> <hr/> <p>The URL is not valid and cannot be loaded.</p> Even if I try to restore the firefox session by replacing the "sessionstore" in Appdata/roaming/Mozilla/firefox/profiles it only rewrites it to 2KB from 5138KB. It just dont want to open my tabs, and all my tab Groups have disappeared. And no, I don't run it in Metro.

Endret av The Last Melody

All Replies (4)

more options

Do not use "Clear history when Firefox closes" to clear the "Browsing History".

Did you check for recently closed tabs and windows after restoring the sessionstore.js file?

Note that this may only work with this setting:

  • Tools > Options > General > Startup: "When Firefox Starts": "Show my windows and tabs from last time"

For the "The address isn't valid" error, try to reset the browser.startup.homepage_override.mstone pref via the right-click context menu to the default on the about:config page and close and restart Firefox to restore the about:home page to its default.

  1. Open the about:config page via the location bar
  2. Type in the Filter bar: mstone
  3. Right-click the browser.startup.homepage_override.mstone line and select: Reset
  4. Close and restart Firefox

If this didn't help then delete the delete the chromeappsstore.sqlite file in the Firefox Profile Folder and repeat the above.

Endret av cor-el

more options

Sorry, but this did not work. Same thing happens, I think I will just give it up and do a system restore. Thanks for trying ^_^

more options

Be careful with using system restore.

Note that using System Restore can cause your Firefox installation to get corrupted because not all files are restored (only files in a white-list), so be cautious with using System Restore.
You may also lose data in the profile folder like .js and .ini files.
You may need to (re)install software that was affected.
Delete the Firefox program folder before reinstalling just in case.

more options

Worked perfectly, it seems.... But thanks for trying ^_^