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disable use of Pinned Tabs

  • 4 Antworten
  • 1 hat dieses Problem
  • 34 Aufrufe
  • Letzte Antwort von cor-el

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Hi all, my daughter has found out that with Pinned Tabs she can work around the site-specific time limits I have set inside a parental control product (on windows10).

Normally the parental control just closes tabs that display a forbidden or over-used web URL. But as Pinned Tabs have no close button it seems to fail. It only reports "time is over".

Is there a way to disable Pinned Tabs ? In about:config maybe?

Thanks and best regards Daniel

Alle Antworten (4)

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Hi Daniel, I don't think there is a setting to disable pinning tabs.

An extension could detect when a tab is pinned and revert it to a normal tab, but your daughter probably would figure that one out, too...


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You can give a pinned tab a close button with code in userChrome.css if that is all you need.

Add code to the userChrome.css file below the default @namespace line.

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */

.tabbrowser-tab .tab-close-button[pinned] {display:-moz-inline-box!important}


In Firefox 69 and later you need to set this pref to true on the about:config page to enable userChrome.css and userContent.css in the chrome folder.

  • toolkit.legacyUserProfileCustomizations.stylesheets = true



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Thanks to cor-el for pointing me to userChrome.org !

 This page contained the clue: "Hiding unwanted menu items" - works also in context menus!

Last problem: how to restrict access to the about:config page?

(have Firefox setting managed by an "organization" == me ? )

Best regards Daniel


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Keep in mind that you can also pin a tab via the three dot page actions menu. You can even add a pin icon to the location bar via the right-click context menu and there are extensions that allow to pin a tab.

You can use a policy to disable access to about:config.


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