Standard icon set (16, 48, 128px) is complete and consistent

Chrome Web Store requires PNG icons at 16px, 48px, and 128px before an extension can be submitted. Missing any size causes an upload error; the store does not auto-resize. Inconsistent icons — different colors or designs across sizes — signal low production quality and erode user trust at the moment of install decision. The 128px icon is the primary visual in the store listing grid; a missing or mismatched icon directly suppresses conversion from store impression to install.

Create PNG icons at exactly 16px, 48px, and 128px from the same source artwork, then reference all three in manifest.json.

{
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  }
}

Export all sizes from a single vector source (Figma, Inkscape) to guarantee visual consistency. Place files under icons/ at the project root. Verify the 16px icon is legible at small size — this appears in browser toolbar and tab favicons.