Glubble is a very impressive browser plugin that adds parental controls to Firefox. Glubble transforms Firefox into a locked down environment where kids can only surf approved sites, while parents can easily log into a restriction-free account for normal web surfing.
Glubble also re-skins Firefox with a simple and appealing kid-friendly look while logged into a child account. The browser under Glubble is a completely controlled environment, meaning all of your bookmarks and most of your other plugins are hidden while logged into a child account (some plugins, like Flash for example, will still work -- a good thing considering how many children's sites utilize Flash).
The plugin is exceptionally easy to install and set up. It's installed via Firefox's automatic plugin installation mechanism, and once you've restarted Firefox you're greeted with Glubble set up screen. From there you set up your administrator accounts and the accounts for your children. Glubble lets you set up child accounts in two flavors: for kids who can read, and kids who can't. The main difference is that the pre-read accounts, as they are called, don't display a URL and search bar, so kids instead navigate by clicking on icons and links to pre-defined sites.
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