Is it possible to customize the appearance of the Firefox tab group window?

On the main browser window, you can access and modify

chrome://browser/content/browser.xul
using the DOM Inspector and adjusting it in the profiles' userChrome.css file.

I am interested in doing something similar for the tab group window (CTRL+SHIFT+E), but I haven't been able to find any information on how to open it in a tab or access the DOM in any other way.

Has anyone attempted this before? Is it possible to achieve it this way, or would I need to delve into more complex methods?

Answer №1

The tab view, displayed as an <iframe> element on the browser content, has its address at

chrome://browser/content/tabview.html
. While opening it in a new tab won't be helpful since it doesn't work within a tab, you can still inspect its contents with the tab view open. To do this, make sure you have the DOM Inspector extension installed. Open DOM Inspector and switch to the browser window's tab groups view. Then, go to File / Inspect Chrome Document / Group Your Tabs on DOM Inspector. This will lead you to your browser window (browser.xul). Look for the correct <iframe> tag by searching for the ID tab-view. Once you locate the <iframe> tag, expand it to examine the structure of its document.

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