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I want to permanently unpin and remove a tab, but the pinned tab keeps opening whenever I restart Firefox.

Posted

I accidentally pinned a tab. Now every time I open Firefox it is there, even if I unpin and close, or just close the tab and restart the browser.

Chosen solution

Changes made manually on the about:newtab page are stored in the browser.newtabpage.pinned (default = [null]) and browser.newtabpage.blocked prefs that you can check/modify on the about:config page

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Additional System Details

Installed Plug-ins

  • Version 3.18.3.12840
  • Google Talk Plugin Video Accelerator version:0.1.44.28
  • Shockwave Flash 11.7 r700
  • Displays Java applet content, or a placeholder if Java is not installed.
  • The Google Earth Plugin allows you to view 3D imagery and terrain in your web browser.
  • 5.1.20125.0
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in web pages. For more information, visit the QuickTime Web site.
  • iPhoto6

Application

  • Firefox 20.0
  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:20.0) Gecko/20100101 Firefox/20.0
  • Support URL: http://support.mozilla.org/1/firefox/20.0/Darwin/en-US/

Extensions

  • Add to Search Bar 2.0 (add-to-searchbox@maltekraus.de)
  • Adobe Acrobat - Create PDF 1.2 (web2pdfextension@web2pdf.adobedotcom)
  • EPUBReader 1.4.2.1 ({5384767E-00D9-40E9-B72F-9CC39D655D6F})
  • Gmail Checker 2.6.1 ({6BFD307A-C040-11DA-9749-FB1C850B47DF})
  • Greasemonkey 1.8 ({e4a8a97b-f2ed-450b-b12d-ee082ba24781})
  • Troubleshooter 1.1a (troubleshooter@mozilla.org)

Javascript

  • incrementalGCEnabled: True

Graphics

  • adapterDescription:
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  • adapterDrivers:
  • adapterRAM:
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  • driverDate:
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  • numAcceleratedWindows: 1
  • numTotalWindows: 1
  • webglRenderer: ATI Technologies Inc. -- ATI Radeon HD 4670 OpenGL Engine
  • windowLayerManagerType: OpenGL

Modified Preferences

  • accessibility.typeaheadfind.flashBar: 0
  • browser.cache.disk.capacity: 358400
  • browser.cache.disk.smart_size.first_run: False
  • browser.cache.disk.smart_size.use_old_max: False
  • browser.cache.disk.smart_size_cached_value: 358400
  • browser.history_expire_days.mirror: 180
  • browser.places.importBookmarksHTML: False
  • browser.places.smartBookmarksVersion: 4
  • browser.search.suggest.enabled: False
  • browser.search.useDBForOrder: True
  • browser.sessionstore.resume_from_crash: False
  • browser.sessionstore.resume_session_once: True
  • browser.startup.homepage_override.buildID: 20130326150557
  • browser.startup.homepage_override.mstone: 20.0
  • dom.mozApps.used: True
  • dom.w3c_touch_events.expose: False
  • extensions.lastAppVersion: 20.0
  • font.internaluseonly.changed: False
  • gfx.blacklist.direct2d: 3
  • gfx.blacklist.layers.direct3d9: 3
  • gfx.blacklist.webgl.msaa: 4
  • network.cookie.prefsMigrated: True
  • places.database.lastMaintenance: 1367729018
  • places.history.expiration.transient_current_max_pages: 104858
  • places.history.expiration.transient_optimal_database_size: 167772160
  • places.last_vacuum: 1296526555
  • plugin.disable_full_page_plugin_for_types: application/pdf
  • privacy.sanitize.migrateFx3Prefs: True
  • security.warn_viewing_mixed: False

Misc

  • User JS: No
  • Accessibility: No
cor-el
  • Top 10 Contributor
  • Moderator
10742 solutions 96657 answers

Chosen Solution

Changes made manually on the about:newtab page are stored in the browser.newtabpage.pinned (default = [null]) and browser.newtabpage.blocked prefs that you can check/modify on the about:config page

Question owner

This somehow fixed itself after a couple of days of unpinning. I'm not sure what I did but if it comes back I will try your method. I just had a look in the about:config page and couldn't find either browser.newtabpage.pinned, nor browser.newtabpage.blocked, but that may be because I no longer have anything pinned. Thank you.

Modified by zxxholly

cor-el
  • Top 10 Contributor
  • Moderator
10742 solutions 96657 answers

Yes, those prefs are only there if you have either pinned or blocked an item on the about:newtab page.

If it happens again and you do not keep changes after a restart then see: