GD Security Toolbox Pro 2.3 is a brand new major update that brings another new addon for Feature Policy header, various improvements to Content Security Policy, more updates and some bug fixes.
The new addon added in this release is called Feature Policy. It adds a new security header for the Feature Policy that is made up of various rules related to various features that the browser can expose to the website and underlying contexts (frames). This is a new header that is not widely used, but it is fully supported by Google Chrome and various other Chromium-based browsers.
Right now, this header supports 18 features, including a gyroscope, battery, microphone, video and many more. This addon will be updated in the future to include new features once they are approved and in use.
Content Security Policy addon now has few more predefined rules for Google YouTube, Google Tag Manager, Gravatar, Gleam and Vimeo. You can use these automatic rules to enable CSP rules for these services, instead of manually adding every rule that these services might need.
This version includes various improvements for Content Security Policy generator, new and updated Firewall rules and it fixes several bugs in the Antispam addon.