Which of the following web browsers is NOT a proprietary software?

Correct option is B

​The correct answer is (b) Mozilla Firefox.

• A proprietary software is one where the source code is not openly available to the public, and its use, modification, and distribution are restricted by the owner.
• In contrast, open-source software allows users to freely access, modify, and distribute its source code.

Explanation of Options:

• Internet Explorer:
• Proprietary software developed by Microsoft. Its source code is not publicly available, and it is exclusively managed by Microsoft.
•  Mozilla Firefox:
• Open-source software developed by the Mozilla Foundation. Its source code is publicly available, allowing developers worldwide to contribute to its improvement. Therefore, it is NOT proprietary software.
•  Safari:
• Proprietary software developed by Apple Inc. The source code of Safari is not publicly accessible, making it a proprietary web browser.
•  Opera:
• Proprietary software owned by Opera Software. Although it uses some open-source components, the majority of the browser is proprietary.

Information Booster:

• Other Open-Source Browsers: Chromium, Brave, and Tor Browser.
• Advantages of Open-Source Browsers: Transparency, flexibility, and security as users can verify the code and adapt it for their needs.