Configure Firefox
- Windows onlyThis script improves your privacy on Windows
- Multiple actionsThis page belongs to a category, containing some changes with similar goal.
- Impact: Minimum
System Functionality / Data Loss Risk: Low
This action improves privacy with minimal impact when you run the recommended script.
- Batch (batchfile)These changes use Windows system commands to update your settings.
- 3 scripts
- No subcategories
- Administrator rights requiredThis script requires privilege access to do the system changes
- Fully reversible
You can fully restore this action (revert back to the original behavior) using this website.
The restore/revert methods provided here can help you fix issues.
Overview
This category provides scripts for enhancing Firefox privacy by limiting data shared with Mozilla.
Apply Now
Choose one of two ways to apply:
Download script
Download and run the script directly- No app needed
- Offline usage
- Easy-to-apply
- Free
- Open-source
Normal — Everyday Privacy (Enterprise-Grade)
- Recommended for all
- Safe for daily use
- No impact on system stability
Read more about Normal and other protection levels
Help
How to apply or restore "Configure Firefox" using script
- ≈ 2 min to complete
- Tools: Web Browser
- Difficulty: Simple
- ≈ 5 instructions
- 1
Download
Download the script file by clicking on the button above.
Use button above to restore changes. - 2
Keep the file
If warned by your browser, keep the file. - 3
Open
Open the downloaded file. - 4
Exit
Once it's done, press any key to exit the window. - 5
Restart
Restart your computer for all changes to take effect.
Apply with privacy.sexy
Guided, automated application with safety checks- Recommended for most users
- Includes safety checks
- Shows the code
- Free
- Open-source
- Popular
- Offline/Online usage
Help
How to apply or restore "Configure Firefox" using privacy.sexy
- ≈ 3 min to complete
- Tools: privacy.sexy
- Difficulty: Simple
- ≈ 4 instructions
- 2
Choose script
- Search for the category name: Configure Firefox
- Check the category by clicking on the checkbox of the category.
- 3
Run
Click on ▶️ Run button at the bottom of the page.This button only appears on desktop version (recommended). On browser, use 💾 Save button.
Explore This Guide
- 3 Privacy settings
Choose what to protect based on your needs: Click any option to learn more about what it does. Each change can be applied and reversed individually.
- Some settings and commands may require technical knowledge to apply correctly.
- Most users find the Normal protection above sufficient.
Disable Firefox default browser and system data reporting
This script disables the Firefox Default Browser Agent. The agent collects and sends information about the user's default browser to Mozilla Disabling it halts the transmission of details such as the currently set default browser, the previous one, and the operating system's locale and version number. This enhances privacy by preventing browser preferences and usage data from being shared with Mozilla. The script configures "HKLM\\SOFTWARE\\Policies\\Mozilla\\Firefox!DisableDefaultBrowserAgent" re...
Disable Firefox background browser checks
This script stops Firefox from automatically checking its default browser status and reporting to Mozilla every 24 hours by disabling specific scheduled tasks that initiate Firefox's Default Browser Agent. It protects your privacy by preventing regular data sharing. Overview of default task statuses - "\\Mozilla\\Firefox Default Browser Agent 308046B0AF4A39CB" (tested on version 118): •OS Version: Windows 10 22H2 → Default status: 🟢 Ready • OS Version: Windows 11 22H2 → Default status: 🟢 Ready `...
Disable Firefox telemetry data collection
This script disables Firefox's telemetry to prevent the collection and transmission of browser performance and usage data to Mozilla. Disabling telemetry prevents both the storage and transmission of this data, ensuring users' browsing habits remain private. The telemetry is disabled by configuring "HKLM\\SOFTWARE\\Policies\\Mozilla\\Firefox!DisableTelemetry" registry key.
Similar Guides
Wider Goal
Guides below includes this guide to achieve a wider goal.See other more general settings that includes this one as one of its actions.
These plans combine multiple privacy settings, including this one, for stronger protection.
- Configure browsers
- Configure programs
This category includes scripts that enhance privacy by adjusting browsers to prevent tracking, minimize data leaks, and restrict personalized ads. These changes he...
Configure programs — to create a safe and private environment from online privacy protection on Windows. Important to mention, to roll back this adjustment, follow...
Same Goal
Other guides in Configure browsersSee settings that are in the same category as this guide.
Using other actions in the same category may help you achieve your goal better.
About the Creators
These people have authored this documentation and written its scripts:
undergroundwires- Certified security professional
- 7+ years experience securing banks
- Open-source developer since 2005
- EU advisor, Public Speaker, Moderator
- Open-Source Contributors
- Hundreds across the globe
- Testers, reviewers, developers
- Companies, military agencies
- Community since 2017
Reviewed By
This guide has undergone comprehensive auditing and peer review:Expert review by undergroundwires
- Verified technical accuracy and editorial standards
- Assessed system impact and user privacy risks
Public review by large community
- Privacy enthusiasts and professionals peer-reviewed
- Millions of end-users tested across different environments
History
We continually monitor our guides, their impact and all other privacy options. We update our guides when new information becomes available. On every update, we publicly store who made the change, what has been changed, why the change was made and when the change was made.