In the [source code](https://dxr.mozilla.org/mozilla-release/source/browser/base/content/browser-ctrlTab.js#120) for the Firefox `Ctrl`+`Tab` behavior there's a hardcoded limit of 6 tabs:

```
/**
 * Ctrl-Tab panel
 */
var ctrlTab = {
  maxTabPreviews: 6,
  //...
    for (let i = 0; i < this.maxTabPreviews; i++) {
      previewsContainer.appendChild(this.makePreview(false));
    }
  //...

```

That’s not a lot. Is there any way apart from doing a complete build from source to alter this behavior?

I'm not looking for a workaround or add-on which can present an alternative list of tabs for instance, I really want to find out if there s a way which essentially has the same effect as putting `maxTabPreviews = 10` but without having to compile a custom version of Firefox. Like userchrom.css which can override certain style elements, but then something which allows overridinng this piece of code.