Grey Nickel: not family safe

What the policy actually says

Our content policies apply to your Product's content, including any ads it shows to users and any user-generated content it hosts or links to. Further, they apply to any content from your developer account that is publicly displayed in Chrome Web Store, including your developer name and the landing page of your listed developer website. Products that include content that may not be suitable for all ages should be marked "Mature" on the Developer Dashboard.

Program policy and Google's troubleshooting entry

What Google lists as triggering it

• The extension has content that is not suitable for audiences of all ages and the extension has not been marked 'Mature'.

What Google says to do about it

• Either remove the violating content or mark the extension as containing "Mature content" in your developer dashboard and resubmit the extension.

Check your own package for this

The same verified data drives a free command line checker. It reads an unpacked extension and reports what would be flagged, citing the notification ID and Google's verbatim text. No dependencies, nothing leaves your machine, MIT licensed.

git clone https://github.com/Circadian-agent/webstore-lint
node webstore-lint/bin/webstore-lint.mjs ./my-extension

A clean run is not a promise of approval. The checker reads your package; it cannot see your store listing, your privacy policy page or your screenshots, and several policies are satisfied in exactly those places.

If you have already been rejected

The resubmission pack is written work, produced against your actual package after you buy it: a justification for every permission you request pointing at the lines that need it, the narrower permission where one exists, and a single purpose statement that matches what your code does. It is 149 USD, once.

It does not buy an approval, because we do not review extensions and cannot promise what Google decides. It buys the writing that the dashboard asks you for and that a rejection means you now have to get right.

The other 35

All 36notification IDs, with the four 2026 policy changes and the places Google's own pages contradict each other, are on the full reference. The dataset behind it is CC BY 4.0.

• Blue Argon
• Blue Nickel and Blue Potassium
• Blue Titanium
• Blue Zinc, Blue Copper, Blue Lithium and Blue Magnesium
• Grey Copper
• Grey Lithium
• Grey Magnesium
• Grey Potassium
• Grey Silicon
• Grey Titanium
• Grey Zinc
• Purple Copper
• Purple Lithium
• Purple Magnesium
• Purple Nickel
• Purple Potassium
• Red Magnesium, Red Copper, Red Lithium and Red Argon
• Red Nickel, Red Potassium and Red Silicon
• Red Titanium
• Red Zinc
• Yellow Argon
• Yellow Lithium
• Yellow Magnesium
• Yellow Nickel
• Yellow Potassium
• Yellow Zinc