BWList is a Chrome extension developed by gdev.bnlacava that allows users to block and whitelist URLs based on simple patterns. The primary purpose of this extension is to keep kids from browsing certain websites during specific times of the day, but it can be used for various other purposes as well.

With BWList, users can block entire domains or specific URLs by adding them to the blacklist. URLs are blocked if any entry in the blacklist is a substring of the URL, and there is no matching substring in the whitelist. This gives users the ability to block certain websites while granting permission to access specific URLs within those websites.

The extension's options page allows users to set the lists, which are stored in synced Google storage and will sync across browsers if Google sync is enabled and the extension is installed. Users can also enable or disable blocking and schedule it independently for each day of the week. Additionally, there is an option to disable blocking for the rest of the day, which can be useful for allowing unrestricted browsing after completing specific tasks.

To ensure security, the extension provides the option to set a password, and it is highly recommended to change the default password. However, if the password is forgotten, there is no way to reset it, and the extension will need to be uninstalled and reinstalled, resulting in the loss of all settings.

BWList does not store or collect any user data, and it does not inspect any website data other than the URL. Furthermore, the message displayed to the user when a site is blocked can be customized on the options page, but HTML is not allowed in the message for security reasons.

Overall, BWList is a helpful Chrome extension for controlling and managing website access, especially for parents who want to restrict their children's browsing activities during certain hours.