---
title: client.browser.version
summary: null
url: >-
  https://www.fastly.com/documentation/reference/vcl/variables/client-request/client-browser-version
---

**Type:** STRING  
**Access:** read-only

**Available in:** all subroutines

The version of the browser in use on client device. This applies to browsers on 
all client devices, not just those for which `client.class.browser` is true.

## Example

An example of applying a `Feature-Policy` based on the major part of a particular
browser's version number:

```vcl
declare local var.browser_version INTEGER;

if (client.browser.name != "" && client.browser.version != "") {
  # capture just the major version
  set var.browser_version = std.atoi(if (client.browser.version ~ "^([0-9]+)", re.group.1, "0"));

  # A vulnerability in WebUSB in Chrome was fixed in v73,
  # so disable USB in any version earlier than that
  if (client.browser.name == "Chrome" && var.browser_version < 73) {
    add resp.http.Feature-Policy = "usb 'none'";
  }
}
```