Instructions to enable or disable Lacros

Google employees: See go/lacros-dogfood.

Enabling Lacros (AKA Lacros only)

Navigate to chrome://flags on the (legacy) Ash browser.

1. Set #lacros-availability-ignore to “Enabled”.
2. Click “Restart”.
3. Set #lacros-only to “Enabled”.
4. Pre M116: Set #lacros-support to “Enabled”.
5. Pre M116: Set #lacros-primary to “Enabled”.
6. Click “Restart”.
7. The Chrome browser icon will now open the Lacros browser!
8. You can leave this mode at any time and return to your previous Chrome OS (Ash) environment and state (windows, tabs).

How to tell if Lacros is enabled

Navigate to chrome://version and check the first line of the version information. If “lacros” is shown somewhere after the version number, then Lacros is enabled.

Disabling Lacros

Navigate to os://flags (if using the Lacros browser), or chrome://flags on the (legacy) Ash browser.

1. Set #lacros-availability-ignore to “Enabled”.
2. Click “Restart”.
3. Pre M116: Set #lacros-support to “Disabled”.
4. Set #lacros-only to “Disabled” and click “Restart”.
5. Device is returned to the original state with the legacy ChromeOS browser (Ash).