Preferences
Every setting, and what it actually changes
The settings page opens from your browser’s extensions menu — Details → Extension options in Chrome, the Preferences tab at about:addons in Firefox. Nothing here is stored anywhere but your own browser, and an open sidebar re-renders the moment you save.
Theme
System, Light, or Dark — the same three the sidebar and the settings page both follow.
On System the extension sets nothing and lets your OS preference decide, so it flips with the rest of your desktop and never flashes the wrong colour on open. Light and Dark override that. (This site’s own toggle, up in the header, works exactly the same way.)
Registrar
Which registrar the register button deep-links into when a name comes back available.
Each entry is a plain domain-search URL with your name prefilled — no referral codes, no affiliate ids. Outbound links do carry a utm_source=extenddomains.com parameter so the destination can see where the visit came from; that is the only thing appended. The one link in the extension that does carry a referral code is the Buy now button — its own setting is below.
Site access
A status row at the top of the settings page showing whether the extension currently holds host access, with a Grant button when it does not.
This exists mostly for Firefox, where Manifest V3 grants no host permissions at install: without them the DNS and site-preview sources report that they are blocked. You can grant from the button a blocked card shows in the panel, or up front from here — the same prompt either way. On Chrome the row reflects whatever you have restricted the extension to, and re-grants it.
Sidebar layout
Show, hide, and reorder the eight blocks. Changes apply immediately to any open sidebar.
Status pills
Registered / available, delegation, parking, email, expiry warnings.
Site preview
Title, description, og:image, theme colour, off-domain redirect flag.
Local score
The 0–100 composite and its breakdown.
History (archive)
First Wayback snapshot and the previous-life note.
Research links
Appraisal, comps, cross-TLD usage, UDRP, trademarks.
Registration
The RDAP registry record.
DNS
NS, A, MX, SPF and DMARC.
Recent lookups
Your last twelve names as chips.
The domain header — the name, its copy/open/refresh buttons, and the search bar — is fixed and not part of the list. If a later version adds a new block, it appears in your layout in its default position rather than being silently hidden by your saved order.
Buy now button
On by default. When a name's nameservers show it is listed for sale on Atom.com, the panel offers a Buy now button instead of leaving you to find the listing yourself.
This link is monetised
The Buy now link carries an affiliate referral code, and the developer may earn a commission if you buy through it. It is the only such link in the extension — the research links and the registrar links carry none. Uncheck Show “Buy now” for listed domains and the button never appears.
The listing is read from the DNS answer the lookup already has — Atom.com serves listed names from its own nameservers, so the delegation is the whole verdict. No extra request is made to detect it, and nothing is sent until you click. Atom is the only marketplace detected this way today.
Research tools
Eleven third-party tools can appear in the Research card; six are on out of the box. Each has its own checkbox, and there is a reset-to-defaults button.
Every one is a nominative link — plain text name, no logo, no referral code. Some take the whole domain (appraisal, sale comps, backlinks) and some take just the label without its TLD, because their subject is the name across every extension: cross-TLD usage, UDRP decisions and trademark registers all work that way.
A tool added in a later version arrives at its own default rather than being switched on behind your back, and your saved choices for the others are kept.
Detection: obfuscated domains
Off by default. People write domains so a post will not auto-link them; turn this on and the extension resolves those spellings.
Marked separators
The word “dot”, [.], (dot), spaced dots, *., and bullets (• · ・). So example dot com and example[.]com both resolve to example.com.
Also treat spaces as dots
A second, noisier toggle. Plenty of ordinary phrases end in something that is also a TLD — “call me” becomes call.me, “log in” becomes log.in. It only does anything while the first toggle is on.
Scoring
The whole tuning surface of the local scorer is exposed, because a good name for a SaaS and a good name for a portfolio are not the same thing.
Component weights are relative
sum = 100Doubling every number changes nothing. What each component is worth is its share of the total — this bar.
Length curve
Labels up to idealLength (default 6) score a full 1.0, then decay linearly to 0 at maxLength (default 20).
A separate shortPremiumMaxLen (default 4) drops the word and pronounceability components for very short all-letter or all-digit labels, so x.com and 777.com are not punished for being absent from a dictionary.
Penalties
Word segmentation
Coverage is multiplied by a per-word-count factor — [1, 1, 0.75, 0.5] by default. One or two clean words is ideal; a four-word pile-up is not, however well each word segments.
TLD table
Edited as one line per TLD, so you can add as many as you like.
The “Try it” box
Where all of this lives
- Your browser, and nowhere else
- Every preference is written to the extension’s own local storage. There is no account, no sync server, and nothing leaves the machine. Uninstalling the extension takes all of it with it.
- New settings keep their defaults
- Saved values are merged over the shipped defaults, so an update that adds a knob does not reset the ones you tuned.
- Reset is always one button
- Both the layout and the scoring form have a reset-to-defaults button.
More on what is stored and what is fetched: Data & privacy.