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HomeDocsClaude Documentation 25 Sep 2026
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Built-in browser and Claude in Chrome changedthird-party/claude-desktop/browser

Nearest release: v2.1.283, published under an hour after upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Upstream edited this page at 25 Sep 2026 17:46 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 28 Sep 2026 22:07 UTC.

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4141[`builtinBrowserDefaultDomainPolicy`](/docs/third-party/claude-desktop/configuration#builtinbrowserdefaultdomainpolicy) decides whether Claude can open every site except the ones you block, or only the sites you allow. Under either value, a site that Anthropic's [site safety check](#site-safety-check) blocks stays blocked to Claude, even when `builtinBrowserAllowedDomains` lists it.
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43| Value | Behavior |
44| ---------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
43| Value | Behavior |
44| - | - |
4545| Unset or `allow` | Claude can open every site except the entries in [`builtinBrowserBlockedDomains`](/docs/third-party/claude-desktop/configuration#builtinbrowserblockeddomains) |
46| `block` | Claude can open only the entries in [`builtinBrowserAllowedDomains`](/docs/third-party/claude-desktop/configuration#builtinbrowseralloweddomains) |
46| `block` | Claude can open only the entries in [`builtinBrowserAllowedDomains`](/docs/third-party/claude-desktop/configuration#builtinbrowseralloweddomains) |
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4848The policy also governs sites that the site safety check flags for confirmation rather than blocks. Under the default `allow` policy, Claude asks the user before each of its actions on such a site. Under `block`, listing the site in `builtinBrowserAllowedDomains` is your organization vouching for it, so Claude works with it without asking before each action. For a site on your private network, Claude Desktop still asks before each action until the user chooses **Always allow** for that site.
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