Changes to toolbars and window sizes are not saved

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In some instances, Firefox may not remember changes you've made to your toolbar settings or certain other configuration changes, like window size or position.

This article explains how to fix the underlying problem that may result in one or more of the following symptoms:

  • You have added, rearranged or removed buttons from your toolbar, but the changes are not saved when you restart Firefox.
  • You have resized or moved the browser window, but the new size and position are not remembered when you restart Firefox.
  • You cannot save new bookmarks.

Here are two ways that you can solve the problem:

Solution 1: Delete xulstore.json file

You may have a corrupt xulstore.json file in your Firefox profile. You can delete this file so that Firefox can create a new one.

  1. Click the menu button Fx57menu , click Help and select Troubleshooting Information.From the Help menu, choose Troubleshooting Information. The Troubleshooting Information tab will open.

    • Under the Application Basics section, click on Open FolderShow in FinderOpen Directory. A window will open that contains your profile folder.Your profile folder will open.
    Note: If you are unable to open or use Firefox, follow the instructions in Finding your profile without opening Firefox.
  2. Close Firefox:

    Click the menu button New Fx Menu and then click ExitQuit Close 29 .

    Click the Firefox menu Fx57Menu , then click Exit. Click the Firefox menu at the top of the screen, then click Quit Firefox.Click the Firefox menu Fx57Menu , then click Quit.

  3. Locate and delete the file xulstore.json (or rename it, for example, to xulstore.jsonOLD, to keep the old file as a backup).
  4. You can close the profile folder and open Firefox now.

Solution 2: Refresh Firefox

If you don't want to try the first solution or if it didn't work, the Firefox refresh feature will automatically restore default toolbar settings and browser window size or position, and will also remove add-ons (extensions and themes) that could be interfering.

Note: When using the refresh feature, your bookmarks, browsing history, open tabs, windows, passwords, cookies and web form auto-fill information will be saved. However, your extensions and themes will be removed and your preferences will be reset. Learn more.
  1. Click this Refresh Firefox button directly, if you are viewing this page in Firefox.
    This won't work if you are using a different browser or on a mobile device.
  2. To continue, click Refresh Firefox in the confirmation window that opens.
  3. Firefox will close to refresh itself. When finished, a window will list your imported information. Click Finish and Firefox will open.

Note: There's also a Refresh Firefox button in the Firefox Safe Mode window, if you can't start Firefox normally. You can also do a manual refresh by creating a new profile and transferring your important data to the new profile.

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