Mozilla Ads ad specs

Mozilla Ads supports 8 documented ad formats across the Browser / Developer category. Browse the full list of placements, dimensions, file size limits, and creative requirements for advertising on Mozilla Ads. Sponsored Tiles, native content cards and IAB display units across Firefox New Tab and MDN Web Docs.

Frequently asked questions

How many ad formats does Mozilla Ads support?
Mozilla Ads currently has 8 documented ad formats in this directory.
What kind of platform is Mozilla Ads?
Mozilla Ads is part of the Browser / Developer category. See the format list above for placements where ads can run.
Where can I find Mozilla Ads's official ad spec documentation?
Each format on this page links out to Mozilla Ads's official source. You can also visit https://www.mozilla.org/en-US/advertising/solutions/ for general information.
Are Mozilla Ads ad specs kept up to date?
Yes — every format page references the original publisher source so the dimensions, file size limits, and codec requirements stay in sync.