Extend.Domains

Highlight a domain on any page and get registration, DNS, metadata, and age in a sidebar.
Chrome + Firefox, Manifest V3.
No backend, no API keys — all data comes from free, keyless public endpoints.

For more information: Extend.Domains

Install

Store listings are pending review; until they are live, use the source install below.

Source Install

git clone https://github.com/patriali/extend.domains.git extenddomains
cd extenddomains

npm install
npm run build       # both targets -> dist/chrome, dist/firefox
npm run watch       # rebuild on change
npm run typecheck
npm test

build.mjs generates the per-browser manifest from one source tree, so shared fields never drift between the two builds.

• Chrome — chrome://extensions -> Developer mode -> Load unpacked -> dist/chrome
• Firefox — about:debugging#/runtime/this-firefox -> Load Temporary Add-on -> dist/firefox/manifest.json

On Firefox nothing resolves until host access is granted — MV3 there hands out no host permissions at install. Use the grant button the sidebar shows, or "Site access" in the options page.

Building for release

npm run release

Type-checks, tests, builds both targets, lints the Firefox build with web-ext, and writes three archives to web-ext-artifacts/: a Chrome zip for the Web Store, a Firefox zip for AMO, and a source archive for AMO's source-code review (the shipped bundles are esbuild output, so AMO requires the source alongside).

To reproduce a submitted build: npm install && npm run build, then compare against dist/. scripts/package.mjs writes fixed timestamps, so the Chrome zip is byte-for-byte reproducible from the same tree.

Privacy

No backend, no accounts, no analytics, no remote code. Each lookup queries public services directly from your browser — DNS-over-HTTPS, RDAP, the Wayback Machine, and the domain's own homepage for its title. See PRIVACY.md for the full list of what is sent where.

Affiliate disclosure: when a domain's nameservers show it is listed on Atom.com, the sidebar's "Buy now" button carries a referral code and may earn the developer a commission. It is on by default and can be turned off in the options. No other link in the extension carries a referral code.

Feedback

Want to request a new feature or report a bug without opening a PR? Email me at info@extenddomains.com.

License

MIT © Danilo Patrial