Efficient User-Agent Customization for Firefox

Custom UserAgent String is a Firefox add-on designed for users who want to personalize their browsing experience by modifying their browser's user-agent. This tool allows users to add site-specific user-agent strings, providing flexibility for different URLs or domains. With a user-friendly options page, users can easily manage their custom user-agent strings and utilize a library of over 100 sample user-agent strings that cover various browsers and devices.

The add-on features a toolbar popup with a simple ON/OFF switch for quick activation. Users can add, delete, or disable user-agent strings as needed, making it a versatile solution for web developers and privacy-conscious individuals. Additionally, users can find user-agent strings through online resources or the provided sample list, ensuring they have access to the latest options for both desktop and mobile environments.

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App specs

  • License

    Subscription

  • Version

    0.2.4

  • Latest update

  • Platform

    firefox

  • Size

    395.39 KB

  • Developer

Program available in other languages



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Laws concerning the use of this software vary from country to country. We do not encourage or condone the use of this program if it is in violation of these laws.
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100/100

Score result: Clean

This file passed a comprehensive security scan using VirusTotal technology. It is safe to download.

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Scan Info

Last scan
Sunday, September 28, 2025
Scan provider
VirusTotal · Full report

File Integrity

File
0.2.4.xpi
SHA256
7096d6905df12c78c5e1f8bc9d82f6e03ee35e4b34bf436079acfd4c79549f13
SHA1
3dbb139d4053e6bf2908316f5688a9379eaa6c39

Softonic security commitment

Custom UserAgent String has been thoroughly scanned by our advanced security systems and verified by industry-leading partners. This file comes from the official developer and has passed all our security checks, showing no signs of viruses, malware, or spyware.