The
Sec-CH-UA-Full-Version-List
user agent client hint
request header provides the user-agent's branding and full version information.
The
Sec-CH-UA-Full-Version-List
header provides the brand and full version information for each brand associated with the browser, in a comma-separated list.
A brand is a commercial name for the user agent like: Chromium, Opera, Google Chrome, Microsoft Edge, Firefox, and Safari.
A user agent might have several associated brands.
For example, Opera, Chrome, and Edge are all based on Chromium, and will provide both brands in the
Sec-CH-UA-Full-Version-List
header.
The header therefore allows the server to customize its response based on both shared brands and on particular customizations in their specific respective builds.
The header may include "fake" brands in any position and with any name.
This is a feature designed to prevent servers from rejecting unknown user agents outright, forcing user agents to lie about their brand identity.
Note:
This is similar to
Sec-CH-UA
, but includes the full version number instead of the significant version number for each brand.