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WhatsApp Web: hide the backup banner

Hides the persistent banner about message backup and the unverified-device notice.

Code to copy

/* Hide the persistent backup / unverified-device banner */
[data-testid="banner-backup"],
[data-testid="banner-unverified"],
div[role="banner"]:has([aria-label*="backup" i]),
div[role="banner"]:has([aria-label*="unverified" i]),
header[data-testid="chatlist-header"] + div[role="alert"] {
  display: none !important;
}

How to use this example

1. Copy the code with the button above.
2. Install JustZix (2 minutes) and open the extension on the target page.
3. Add a new rule matching that page.
4. Paste the code into the rule's CSS panel and save — the effect appears instantly.