Does Being a Major Chromium Version Behind Chrome Stable Mean a Browser Is Insecure?

Updated

Not necessarily. A browser can sit one or more Chromium major versions behind Chrome Stable and still be secure, because some browsers intentionally track Chromium's Extended Stable channel and backport security fixes from newer releases. The version number alone doesn't tell you whether a browser is missing patches — but version lag still matters, since a browser that genuinely ships an older Chromium build can expose users to known, already-patched vulnerabilities.

Why the version number is a weak security signal

Chromium Drift tracks which Chromium version each major desktop browser is currently shipping, and it flags lag with colors:

  • Blue — same Chromium major version as Chrome Stable, or ahead.
  • Yellow — 1 major version behind.
  • Red — 2 or more major versions behind.

It's tempting to read yellow or red as "insecure." That inference breaks down for two reasons.

1. Extended Stable is a deliberate strategy

Chromium maintains an Extended Stable channel alongside the regular Stable channel. Browsers that follow Extended Stable stay on an older major version on purpose, then receive security fixes backported from newer releases. On the version number they look behind; in practice they may be carrying the same security patches.

2. Chrome Stable itself rolls out gradually

Google rolls out each Chrome Stable release over time. That means the version Chromium Drift reports for Chrome can briefly lag the newest Chromium major even after that major has shipped. Another Chromium browser that has already picked up the newer major isn't "ahead" in any meaningful sense — it's just not waiting on a gradual rollout. Chromium Drift handles this by showing such a browser as up to date (blue) rather than as a leader.

For Chrome specifically, the dashboard shows the newest release that system administrators can pin, which excludes partial rollouts and A/B test builds. So the reference point is a pinnable release, not the bleeding edge.

When version lag does matter

The version number is a weak signal, not a meaningless one. Chromium Drift's own framing is that when a browser ships an older Chromium version, its users may be exposed to known, already-patched security vulnerabilities. The operative word is "may" — it depends on whether that browser is backporting fixes or simply not updating.

Version lag has a second, non-security cost: users on older Chromium versions don't get the latest Web APIs and features, which shows up as website compatibility issues.

So the practical question isn't "how many majors behind is it?" but "is this browser still receiving security patches?" A browser two majors behind that backports fixes is in a different position from one that has simply stopped updating.

How to check your own situation

  1. Find your browser's Chromium version. Chromium Drift points to chromiumchecker.com for this. Note that some browsers use their own versioning scheme that doesn't line up directly with Chromium's numbers — which is also what makes it hard to know which Chromium version they're based on.
  2. Compare against the dashboard. Match your browser's row and read the color: blue, yellow, or red.
  3. Interpret with the caveat above. A yellow or red row is a prompt to check the browser's update channel and security-patch policy, not a verdict. If the browser documents that it tracks Extended Stable and backports fixes, the version gap is expected behavior.
  4. If your browser shows a different version than the dashboard, that's usually rollout timing. Browsers roll out updates gradually, and the dashboard shows the version officially designated as stable — the new version may not reach all users for a day or two.

Data freshness, so you know what you're comparing against

  • Live-fetched browsers update on every page load (fetched from public APIs).
  • CI-detected browsers update once daily via GitHub Actions, by extracting version info from their binaries.

If your browser is CI-detected and you just updated, the dashboard may not reflect it until the next daily run.

Bottom line

Being a major version behind Chrome Stable is not by itself proof of insecurity. Browsers on Chromium's Extended Stable channel can be a major version behind and still receive backported security fixes. Treat the color as a question to investigate — does this browser still patch? — rather than an answer. Version lag remains worth caring about for both security exposure and missing web features when a browser isn't backporting.

If a browser you use isn't listed, the dashboard covers major Chromium-based desktop browsers, and you can open an issue on the GitHub repo to request an addition.