Firefox 153 enables Containers by default, and you can create your own - here's how

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The developers at Mozilla have decided to give their Firefox browser a bit of a security nudge with version 153.

The security upgrade kicks off by enabling Containers by default. If you're unfamiliar with this important security feature, I wrote an introductory explainer on Firefox Containers . The gist is simple: Firefox containers isolate tabs from one another, so information from one tab cannot leak to another. This prevents sensitive data in one tab from being exposed on the off chance that another tab lands on a malicious site. Also, it prevents one site from snagging data from another tab to create a profile or fingerprint of you.

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And because Containers isolate cookies, you could even log into different accounts for the same service in one browser.

Firefox Containers are all about security and privacy, and they do a great job of fulfilling those imperatives.

Prior to version 153, Containers were an opt-in feature, but now they're opt-out. Out of the box, you'll get four pre-configured containers: Personal, Work, Banking, and Shopping. You can also add new containers if needed.

To open a new tab in a container, all you have to do is right-click the new tab button and select which Container you want to use.

If you want to work with containers, use the New Tab button.

If you want to make this even easier, you can enable the selection of a container for each new tab you open. To do this, go to Settings > Tabs and browsing > Manage settings and click the checkbox to enable "Select a container for each new tab."

This is one feature that's not enabled by default.

After enabling that feature, every time you click the new tab button (+ in the tab bar), you'll see the Container selector drop-down. If you want to open a tab outside of a container, you can use the Ctrl+T keyboard shortcut.

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Another addition to Firefox 153 is local network access restrictions. This new feature controls whether websites can access the apps and services found on your local network and local devices.