Firefox users with Beta and Developer Edition versions may encounter the disappearance of the bookmarks bar, toolbar buttons, and pinned extensions12 due to bug 1919721. This issue arises from a flawed logical condition that affects toolbar management in Firefox.
Mozilla has addressed this bug in version 132.0b23 by modifying the logical condition with gFuturePlacements.get(area)?.size
4. However, affected users must manually adjust their preferences to restore these features. The following steps will help you resolve this issue:
Make a copy of your profile folder before making any changes. This precaution ensures that you can revert any modifications if issues arise.
Back up and restore information in Firefox profiles
Steps to Fix the Issue
Method 1: Delete toolbar customization line (Easiest)
- Open Firefox and type
about:profiles
in the address bar, then press Enter. You may see a warning; confirm your action to proceed. - Locate the profile that is set as "Default Profile".
- Click on "Open Folder" next to where it shows "Root Directory".
- In the opened directory, open
prefs.js
with a text editor and delete the line that starts withuser_pref("browser.uiCustomization.state"
(entire line).
Method 2: Restore basic toolbar elements
- Type
about:config
in the address bar and press Enter. You may see a warning; confirm your action to proceed. - Search for the preference
browser.uiCustomization.state
. - Copy the JSON string into a text editor for easier modification.
- Locate and modify the first occurrence of
"PersonalToolbar":[]
in the JSON, replacing it with:"PersonalToolbar":["personal-bookmarks"]
- Identify and replace the contents of
"TabsToolbar":[]
with:"TabsToolbar":["firefox-view-button", "tabbrowser-tabs", "new-tab-button", "alltabs-button"]
- Copy the revised JSON string back into the
browser.uiCustomization.state
field inabout:config
. - Click the check button to save your changes, then restart Firefox to apply these modifications.
Rearrange Icons or Restore Defaults
- Right-click on any blank space within your toolbar and select "Customize Toolbar…" from the context menu, or navigate to View > Toolbars > Customize Toolbar… via the main menu.
- You can either restore default configurations or manually drag and drop icons to rearrange them as per your preference.
For more details check out Customize Firefox controls, buttons and toolbars.
By following these steps, you should be able to effectively restore and customize your Firefox Beta toolbar settings without encountering the bug-induced issue again. If issues persist after trying these methods, consider reaching out to Mozilla support for further assistance.
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update bug in Firefox 132.0beta "Bookmarks Toolbar… - Mozilla Connect. Mozilla. ↩
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Users of Firefox Beta / Developer Edition 132, anybody else got messed up toolbar? : r/firefox. Reddit. ↩
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mozilla-beta: pushlog. Mozilla. ↩
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mozilla-beta: changeset 832927:2f1eeae41cad2f7e2d4cd4f6f80b2cff17318745. Mozilla. ↩