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. At the top of the Firefox window, click on the Firefox button, go over to the Help menuOn the menu bar, click on the Help menuAt the top of the Firefox window, click on the Help menu and select Troubleshooting Information. The Troubleshooting Information tab will open.Click the menu button New Fx Menu , click help Help-29 and select Troubleshooting Information. The Troubleshooting Information tab will open.

  2. Under the Application Basics section, click on Show FolderShow in FinderOpen Directory. A window with your profile filesfolder will open.
  3. Note: If you are unable to open or use Firefox, follow the instructions in Finding your profile without opening Firefox.
  4. Close Firefox:

    At the top of the Firefox window, click on the Firefox button and then select ExitAt the top of the Firefox window, click on the File menu and then select ExitOn the menu bar, click on the Firefox menu and select Quit FirefoxAt the top of the Firefox window, click on the File menu and select Quit.

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

  5. Locate and delete the file xulstore.json (or rename it, for example, to xulstore.jsonOLD, to keep the old file as a backup).
  6. 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.When using the reset 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.When using the reset feature, your bookmarks, browsing history, passwords, cookies and web form auto-fill information will be saved. However, your extensions and themes will be removed; open tabs, windows and tab groups will not be saved; and your preferences will be reset. Learn more.
  1. At the top of the Firefox window, click the Help menu and select Troubleshooting Information.At the top of the Firefox window, click the Firefox button, go over to the Help sub-menu and select Troubleshooting Information.On the menu bar, click the Help menu and select Troubleshooting Information.
    Reset Firefox 1 - WinXP Troubleshooting info - win Troubleshooting info - mac Troubleshooting info - lin
    If you're unable to access the Help menu, type about:support in your address bar to bring up the Troubleshooting Information page.
  2. Click the Reset Firefox button in the upper-right corner of the Troubleshooting Information page.
    Reset Firefox 2 - WinXP Reset Firefox - Win - 1 Reset Firefox - Mac - 1 Reset Firefox - Lin - 1
  3. To continue, click Reset Firefox in the confirmation window that opens.To continue, click Reset Firefox in the confirmation sheet that slides down.
  4. Firefox will close and be reset. When it's done, a window will list the information that was imported. Click Finish and Firefox will open.Firefox will close and be reset. When it's done, a window will list the information that was imported. Click Done and Firefox will open.
  1. Click the menu button New Fx Menu and then click help Help-29 .
  2. From the Help menu choose Troubleshooting Information.
    If you're unable to access the Help menu, type about:support in your address bar to bring up the Troubleshooting Information page.
  3. Click the Reset Firefox… button in the upper-right corner of the Troubleshooting Information page.
    Reset 29 Win Reset 29 Mac Reset 29 Lin
  4. To continue, click Reset Firefox in the confirmation window that opens.
  5. Firefox will close and be reset. When it's done, a window will list the information that was imported. Click Finish and Firefox will open.
  1. Click this Refresh Firefox button directly, if you are viewing this page in Firefox (it won't work if you are using a different browser or on a mobile device). You will also find a Refresh button on the top right corner of the Firefox about:support Troubleshooting Information page.
  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 Reset Firefox button in the Firefox Safe Mode window, if you can't start Firefox normally.

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