Firefox unveiled a handful of new features this week via its Test Pilot program, and two caught our eye: A new Side View that allows you to view two sites within the same window side-by-side, and Firefox Color, a feature that allows you to aggressively customise your browser's colours.

Firefox has started rolling out two-factor authentication, and if you use the browser to store any passwords you should enable it now.

Google is planning to change the user interface in Chrome. The green padlock we’ve taught users to look for when they’re browsing is set to disappear as the company says we should assume all sites are secure. Instead, we’ll see a "Not Secure" indicator when a site doesn’t use HTTPS.

Unsecured web browsers are a key vector used by malware distributors and threat actors. So, it's unsurprising that browser developers are constantly looking for ways to protect users. If you're a member of Microsoft’s Enterprise business service and are in the Fast Ring test group then you'll get access to Windows Defender Application Guard. This is a sandbox that keeps the browser window isolated from the rest of your computer's resources.

Windows/Mac/Linux: A few months ago, Opera launched its own free, built-in VPN, but you could only get it if you manually enabled it in the dev version of the browser. Now, it's available for everyone in the stable version of Opera.

Windows/Mac/Linux: Opera users just got a free, unlimited VPN that you can use to encrypt your data or get around location-based restrictions on content. It's currently in the dev version of Opera, but turning it on is as easy as flipping a switch.