Firefox 21 Features: New Security and Privacy Settings

Updated June 2024: Stop getting error messages and slow down your system with our optimization tool. Get it now at this link
  1. Download and install the repair tool here.
  2. Let it scan your computer.
  3. The tool will then repair your computer.

Firefox 21 was recently published. The new version has improved security and privacy features and settings. In addition, there are some more amazing features in the new improved version. In this article, we can discuss new features and improvements of the new Firefox 21.

UPDATE : Firefox 29 comes with new design and customization options.

New security and privacy features in Firefox 21

June 2024 Update:

You can now prevent PC problems by using this tool, such as protecting you against file loss and malware. Additionally it is a great way to optimize your computer for maximum performance. The program fixes common errors that might occur on Windows systems with ease - no need for hours of troubleshooting when you have the perfect solution at your fingertips:

  • Step 1 : Download PC Repair & Optimizer Tool (Windows 10, 8, 7, XP, Vista – Microsoft Gold Certified).
  • Step 2 : Click “Start Scan” to find Windows registry issues that could be causing PC problems.
  • Step 3 : Click “Repair All” to fix all issues.


When you open Firefox options, you will see a new feature added under the Privacy tab. Now you can easily manage how web pages follow you on the Internet. You can tell sites that I don’t want to be tracked’ or you can say’Sites that I want to be tracked’ or you can simply choose’Sites say nothing about my track preferences’. Tracking adjustment is really very useful. If we see individually, there are always different opinions on the possibilities of follow-up. You can use this function to customize your ads on the Internet.

Firefox developers call this feature’Enhanced Three-State User Interface for Not Tracking (DNT)’.

The Instant Web Site ID function informs you how to transfer data between a Web site and your PC. As its name suggests, it works immediately and gives you instant access to information on a website. The content security policy minimizes all possible attacks on your computer by providing a mechanism that allows websites to explicitly tell the browser what content is appropriate. With this feature, you always stay safe on the Internet.

Never leave a trace on the website. Private Browsing allows you to view the website in a special way that restricts the transfer of information. However, if you forgot to switch to private mode, you can select’Forgot this page’, with this function you can delete any track from your computer that says you were on this site.

Anti-Virus and Anti-Malware have been integrated into the program to provide you with the best possible security when downloading files or exchanging data. The anti-phishing feature alerts you whenever you open a fraudulent website with phishing files.


Enhanced security features allow you to surf the Internet easily and without data loss. In the previous version, there were some problems updating Windows registry entries, but the problem seems to be fixed in the new version.

The new Firefox 21 comes with important security and privacy updates. The Internet has become smoother and more secure. We are all waiting for more and more security updates so that we can surf the Internet without risk or fear.

Other interesting features can be found here.

Firefox users may find these messages interesting:

      1. Mozilla Firefox gel or crash on Windows computer
      2. Mozilla Firefox slows down under Windows 8 | 7.

Expert Tip: This repair tool scans the repositories and replaces corrupt or missing files if none of these methods have worked. It works well in most cases where the problem is due to system corruption. This tool will also optimize your system to maximize performance. It can be downloaded by Clicking Here