Enable Firefox Monitor add-on in Firefox 65 and 66

With the launch of Firefox 67, the Mozilla Foundation will release Firefox Monitor as an additional extension by default. For those who do not know, today it is an autonomous service with which users can find out if their data has leaked.

This service will be publicly released to all Firefox users and will provide real-time alerts when a user visits a site that has been tampered with and has leaked data. The feature though is not enable in Firefox 65 and 66 by default.

According to the bug tracker ( # 1, # 2 ), users who have already registered with Firefox Monitor receive a notification of the pages that have been compromised. Also, if the site corrected the security gaps after the data breach and leakage, then the browser will not display any alerts.

Firefox Monitor is already available on Firefox 65 but is disabled by default. To work, you must turn it on manually. Let's see how:

1. Start your Firefox browser and in the address bar type: about:config 

2. It will open an internal page. Click the "I accept the risk" button to continue.

3. Then, in the search bar, copy and paste "extensions.fxmonitor.enabled" and the setting will be displayed.

4. You will find that his value is set to False.

5. To change the value to True, double-click it. This will turn Firefox Monitor into your browser.

6. Restart your Firefox browser.

If you are now visiting a site that is already in the list of pages that have been violated by HaveIBeenPwned, a warning will appear in the URL bar to alert you that the page has broken and data has been leaked.