Disable background tab notification?

[Seismix]

Is there a way to disable the "New background tab opened!" toast when I do so? It's really annoying :(

[Koneke]

Would be very appreciated, it's incredibly distracting and my immediate reaction on updating was frantically looking for an option to disable it. Running Zen largely to avoid stuff popping on my screen 😬

[LianggaRistiana]

Same issue here

[schizokid88]

You can try to edit userChrome.css and settings display: none; for the toast. Hope that devs will add some about:config parameter to disable this toast, it is really annoying...

[Yuwain]

Would also love it if the toast didn't happen on URL copy either. Maybe just a way to turn off toasts entirely?

[rodrigomoretto]

I find it a bit annoying as well and was looking for this.
But would like to that it could be customizable, like reducing the duration or change colors, or disable too.
That would be interesting.

[rodrigomoretto]

In case anyone wants to disable it, like @schizokid88 mentioned you can edit the userChrome.css with the following code:

#zen-toast-container {
  display: none !important;
}

Still couldn't find a way to customize with duration or color like I've mentioned but I guess this is more of a javascript change rather than CSS.

I'll leave the print of what I could get from that, because it changes so fast.