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Costa Michailidis
Asked: 2019-02-01 07:57:28 +0800 CST

How to remove drag tab in corner of firefox window

  • 772

There's a little grey area in the corner of my Firefox browser. I believe it's meant for dragging, but I have a key combo for that, and would like to reclaimed that little grey space.

enter image description here

How could I get rid of that little grey area? I remember finding a solution to this in the past, but upgrading to Firefox 65 seems to have resurfaced this nuisance : (

So, found my user browser chrome settings: 

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

.titlebar-placeholder[type="pre-tabs"],
.titlebar-placeholder[type="post-tabs"] {
  display:none !important;
}

For some reason this isn't working after upgrading to Firefox 65.

Also, I disabled an extension that manages tab groups, restarted the browser and all that, but it wasn't the culprit.

windows firefox

2 Answers

  1. Best Answer

    Okay, solved this one. Firefox seems to have updated class names for the tab space draggable area things.

    Here's the updated css:

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

.titlebar-placeholder[type="pre-tabs"],
.titlebar-placeholder[type="post-tabs"] {
  display: none !important;
  width: 0px !important;
  max-width: 0px !important;
}

.titlebar-spacer[type="pre-tabs"],
.titlebar-spacer[type="post-tabs"] {
  display: none !important;
  width: 0px !important;
  max-width: 0px !important;
}

    Old naming convention above, and new one below. My display none and width 0 are probably a bit redundant.

    Also, for those who don't know, this file should be named userChrome.css and should go in a folder called chrome that you create inside of ~.mozzilla/firefox/random-lettersi432789fd.default

    There are better instructions than mine for how to edit the userChrome.css file out there.

    • 5

  2. I would comment but I don't have enough rep. I don't think I have an answer, but here goes.

    I don't have that little gray space you have, neither in full screen nor in a smaller window dimension. It seems more like a hidden tab, and I found this related page, where the suggestions would be:

    • it might be related to an Add-On (like the OP finds out);
    • it might be related to problems with the sessionstore.js file in the profile folder that stores session data. You can find it in Help -> Troubleshooting Information -> Profile Directory -> Open Directory (info)

    Hope it helps anyways.

    • 1