Administrators

Deploying Data Saver by policy

Force-install it, pin the settings you care about, and leave the rest to the user. Everything below uses the browser's own extension policy — there is no agent, no installer and no licence key to distribute.

Extension ID

cjijlgnefahbmcogbhacnnnlnaeolmjg

Browsers

Chrome · Edge

version 111 or later

Platforms

All

Windows, macOS, Linux, ChromeOS

1. Force-install the extension

Use the browser's existing extension policy. On Windows this is the ExtensionInstallForcelist Group Policy setting under Google Chrome → Extensions; the same key exists for Edge and in the Google Admin console.

cjijlgnefahbmcogbhacnnnlnaeolmjg;https://clients2.google.com/service/update2/crx

Users cannot remove a force-installed extension, which is usually what you want for a measured pilot — a rollback then means removing the policy rather than chasing devices.

2. Pin the settings you care about

Policy is delivered through the 3rdparty section of the browser's managed policy, keyed by extension ID. Only the keys you set are enforced — anything you leave out stays under the user's control, so you can lock image blocking on and still let people switch video blocking off themselves.

A typical starting policy

Ads and images blocked, video left alone, and two internal applications exempted so nothing breaks on the first morning:

{
  "3rdparty": {
    "extensions": {
      "cjijlgnefahbmcogbhacnnnlnaeolmjg": {
        "ads": true,
        "images": true,
        "media": false,
        "allowlist": ["intranet.example.org", "erp.example.org"],
        "siteProfiles": {
          "docs.example.org": { "images": false }
        }
      }
    }
  }
}

In that example allowlist switches blocking off entirely for two internal systems, while siteProfiles keeps ads blocked on the documentation site but lets its images through — the narrower fix, and usually the better one.

Where the file goes

3. Confirm it applied

1. Open chrome://policy on a target device and check the extension's policy appears with the values you set.
2. Open the extension's dashboard. Managed settings are shown at their enforced value and greyed out, with a notice saying they are managed by your organisation.
3. Load a page with advertising on it and open the popup. The blocked count should move.

Rollback

Remove the extension ID from ExtensionInstallForcelist and the browser uninstalls it at the next policy refresh. No files are left behind, and nothing needs to be cleaned up on the device — all state lived in the browser's own extension storage.