Coc Coc browser user agent
Coc Coc is a Chromium-based browser developed in Vietnam and widely used there. Because it is built on Blink, its user agent looks Chrome-like but inserts an additional coc_coc_browser token with its own version. That token is the reliable signal that a visit came from Coc Coc rather than mainline Chrome.
What this means
Coc Coc is a desktop and mobile browser built on Chromium and aimed primarily at the Vietnamese market, with features tuned for Vietnamese search and content. Because it shares the Blink engine, it presents a Chrome-style user agent and inherits Chrome's rendering behaviour.
The distinguishing detail is an added coc_coc_browser token with its own version number, sitting alongside the usual Chrome token. Detectors that only look for Chrome will silently fold Coc Coc traffic into Chrome and lose the distinction.
How it identifies itself
Look for the coc_coc_browser product token plus a version, accompanied by a Chrome token and the standard AppleWebKit compatibility chain. On mobile the string also carries Android or iOS platform tokens.
Match on the coc_coc_browser token rather than trying to subtract it from Chrome heuristically. As with any browser, the string is client-supplied and can be edited, so treat it as a claim, not proof of identity.
- Adds a coc_coc_browser token with its own version
- Built on Chromium, so it also carries a Chrome token
- Audience skews toward Vietnam; available on desktop and mobile
How it appears in analytics and logs
A user agent carrying a coc_coc_browser token next to a Chrome token indicates a Coc Coc browser session, which skews heavily toward a Vietnamese audience. It is a real human browser, not automation.
Diagnostic use case
Recognise Coc Coc visitors who would otherwise be counted as Chrome, and gauge how much of your audience uses this Vietnam-focused browser.
What WebmasterID can help detect
WebmasterID recognises the coc_coc_browser token so Coc Coc sessions are attributed to the right browser family instead of being merged into generic Chrome, giving a truer picture of regional browser mix.
Common mistakes
- Counting Coc Coc sessions as plain Chrome because both carry a Chrome token.
- Treating the Vietnam tilt as an exact location rather than a coarse pattern.
- Assuming the coc_coc_browser token cannot be spoofed.
Privacy and accuracy notes
The coc_coc_browser token names a browser brand, not a person, and any audience tilt toward Vietnam is a coarse pattern, never a precise location. WebmasterID treats it as a browser-family signal only.
Related pages
- Chrome user agent and its quirks
Chrome's user-agent string is full of historical artefacts: it claims AppleWebKit and Safari for compatibility even though Chrome uses the Blink engine. Google has also reduced the detail Chrome exposes in the UA, moving fine-grained information into User-Agent Client Hints. This page explains the pattern and the quirks.
- Browser user agents: how to read them
A browser user-agent string packs several tokens into one line: a legacy Mozilla prefix, a rendering-engine signature, the platform, and the browser itself. This page explains each part so you can read a UA without over-reading it, because the contents are client-controlled and can be copied by any client.
- UC Browser user agent
UC Browser is a mobile-first browser developed by UCWeb (an Alibaba company), widely used in India, Indonesia, and other South and Southeast Asian markets. Its user agent commonly carries a UCBrowser product token. Some configurations route traffic through a compression proxy, which can affect how requests appear.
- Privacy-first analytics
Attribute browser families like Coc Coc without tracking individuals.
Sources and verification notes
- Cốc Cốc — search engine helpOfficial Coc Coc site; the browser adds a coc_coc_browser token to a Chromium user agent.
Last reviewed 2026-06-24. Facts are checked against primary/official sources where available; uncertain specifics are marked “Data not yet verified” rather than guessed.