Disable Firefox background browser checks

Overview

About this script

This script improves your privacy on Windows.

These changes use Windows system commands to update your settings.

This script stops Firefox from automatically checking its default browser status and reporting to Mozilla every 24 hours 1 2 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	Default status
Windows 10 22H2	🟢 Ready
Windows 11 22H2	🟢 Ready

\Mozilla\Firefox Default Browser Agent D2CEEC440E2074BD (tested on version 118):

OS Version	Default status
Windows 10 22H2	🟡 N/A (missing)
Windows 11 22H2	🟡 N/A (missing)

This script uses Batch (batchfile) scripting language.

Safe for General Use

This script is recommended for all users. It helps to improve privacy without affecting stability.

Implementation Details

• Language: batch

• Required Privileges: Administrator rights

• Compatibility: Windows only

• Reversibility: Can be undone using provided revert script

Explore Categories

Configure Firefox

This action belongs to Configure Firefox category. This category provides scripts for enhancing Firefox privacy by limiting data shared with Mozilla. Read more on category page ▶

Configure browsers

This action belongs to Configure browsers category. This category includes scripts that enhance privacy by adjusting browsers to prevent tracking, minimize data leaks, and restrict personalized ads. These changes help protect user privacy across different web browsers and optimize system performance by reducing privacy-invasive processing. Read more on category page ▶

Configure programs

This action belongs to Configure programs category. This category configures Windows using 111 scripts. These scripts are organized in 22 categories. The category includes 5 subscripts and 9 subcategories that include more scripts and categories. Read more on category page ▶

Apply now

Choose one of three ways to apply:

1. Automatically via privacy.sexy: The easiest and safest option.
2. Manually by downloading: Requires downloading a file.
3. Manually by copying: Advanced flexibility.

Alternative 1. Apply with Privacy.sexy

privacy.sexy is free and open-source application that lets securely apply this action easily.

Open privacy.sexy

You can fully restore this action (revert back to the original behavior) using the application.

privacy.sexy instructions

1. Open or download the desktop application
2. Search for the script name: Disable Firefox background browser checks.
3. Check the script by clicking on the checkbox.
4. Click on Run button at the bottom of the page.

Alternative 2. Download

Irreversible Changes

This script is irreversible, meaning there is no straightforward method to restore changes once applied. Exercise caution before running, restoring it may not be possible.

1. Download the script file by clicking on the button below:

   Download script

2. Run the script file by clicking on it.

Download revert script

This file restores your system to its original state, before this script is applied.

Download restore script

Alternative 3. Copy

This is for advanced users. Consider automatically applying or downloading the script for simpler way.

1. Open Command Prompt as administrator.

HELP: Step-by-step guide

1. Click on Start menu

   Windows 11

   

   Windows 10

   

2. Type cmd

   Windows 11

   

   Windows 10

   

3. Right click on Command Prompt select Run as administrator

   Windows 11

   

   Windows 10

   

4. Click on Yes to run Command Prompt

   Windows 11

   

   Windows 10

   

---

Windows 11

Windows 10

2. Copy the following code:

Code to apply changes

:: Disable scheduled task(s): `\Mozilla\Firefox Default Browser Agent 308046B0AF4A39CB`
PowerShell -ExecutionPolicy Unrestricted -Command "$taskPathPattern='\Mozilla\'; $taskNamePattern='Firefox Default Browser Agent 308046B0AF4A39CB'; Write-Output "^""Disabling tasks matching pattern `"^""$taskNamePattern`"^""."^""; $tasks = @(Get-ScheduledTask -TaskPath $taskPathPattern -TaskName $taskNamePattern -ErrorAction Ignore); if (-Not $tasks) { Write-Output "^""Skipping, no tasks matching pattern `"^""$taskNamePattern`"^"" found, no action needed."^""; exit 0; }; $operationFailed = $false; foreach ($task in $tasks) { $taskName = $task.TaskName; if ($task.State -eq [Microsoft.PowerShell.Cmdletization.GeneratedTypes.ScheduledTask.StateEnum]::Disabled) { Write-Output "^""Skipping, task `"^""$taskName`"^"" is already disabled, no action needed."^""; continue; }; try { $task | Disable-ScheduledTask -ErrorAction Stop | Out-Null; Write-Output "^""Successfully disabled task `"^""$taskName`"^""."^""; } catch { Write-Error "^""Failed to disable task `"^""$taskName`"^"": $($_.Exception.Message)"^""; $operationFailed = $true; }; }; if ($operationFailed) { Write-Output 'Failed to disable some tasks. Check error messages above.'; exit 1; }"
:: Disable scheduled task(s): `\Mozilla\Firefox Default Browser Agent D2CEEC440E2074BD`
PowerShell -ExecutionPolicy Unrestricted -Command "$taskPathPattern='\Mozilla\'; $taskNamePattern='Firefox Default Browser Agent D2CEEC440E2074BD'; Write-Output "^""Disabling tasks matching pattern `"^""$taskNamePattern`"^""."^""; $tasks = @(Get-ScheduledTask -TaskPath $taskPathPattern -TaskName $taskNamePattern -ErrorAction Ignore); if (-Not $tasks) { Write-Output "^""Skipping, no tasks matching pattern `"^""$taskNamePattern`"^"" found, no action needed."^""; exit 0; }; $operationFailed = $false; foreach ($task in $tasks) { $taskName = $task.TaskName; if ($task.State -eq [Microsoft.PowerShell.Cmdletization.GeneratedTypes.ScheduledTask.StateEnum]::Disabled) { Write-Output "^""Skipping, task `"^""$taskName`"^"" is already disabled, no action needed."^""; continue; }; try { $task | Disable-ScheduledTask -ErrorAction Stop | Out-Null; Write-Output "^""Successfully disabled task `"^""$taskName`"^""."^""; } catch { Write-Error "^""Failed to disable task `"^""$taskName`"^"": $($_.Exception.Message)"^""; $operationFailed = $true; }; }; if ($operationFailed) { Write-Output 'Failed to disable some tasks. Check error messages above.'; exit 1; }"

3. Right click on command prompt to paste it.
4. Press Enter to apply remaining code.

Copy restore code

Copy and run the following code to restore changes:

Revert code

:: Restore scheduled task(s) to default state: `\Mozilla\Firefox Default Browser Agent 308046B0AF4A39CB`
PowerShell -ExecutionPolicy Unrestricted -Command "$taskPathPattern='\Mozilla\'; $taskNamePattern='Firefox Default Browser Agent 308046B0AF4A39CB'; $shouldDisable =  $false; Write-Output "^""Enabling tasks matching pattern `"^""$taskNamePattern`"^""."^""; $tasks = @(Get-ScheduledTask -TaskPath $taskPathPattern -TaskName $taskNamePattern -ErrorAction Ignore); if (-Not $tasks) { Write-Warning ( "^""Missing task: Cannot enable, no tasks matching pattern `"^""$taskNamePattern`"^"" found."^"" + "^"" This task appears to be not included in this version of Windows."^"" ); exit 0; }; $operationFailed = $false; foreach ($task in $tasks) { $taskName = $task.TaskName; if ($shouldDisable) { if ($task.State -eq [Microsoft.PowerShell.Cmdletization.GeneratedTypes.ScheduledTask.StateEnum]::Disabled) { Write-Output "^""Skipping, task `"^""$taskName`"^"" is already disabled, no action needed."^""; continue; }; } else { if (($task.State -ne [Microsoft.PowerShell.Cmdletization.GeneratedTypes.ScheduledTask.StateEnum]::Disabled) -and ($task.State -ne [Microsoft.PowerShell.Cmdletization.GeneratedTypes.ScheduledTask.StateEnum]::Unknown)) { Write-Output "^""Skipping, task `"^""$taskName`"^"" is already enabled, no action needed."^""; continue; }; }; try { if ($shouldDisable) { $task | Disable-ScheduledTask -ErrorAction Stop | Out-Null; Write-Output "^""Successfully disabled task `"^""$taskName`"^""."^""; } else { $task | Enable-ScheduledTask -ErrorAction Stop | Out-Null; Write-Output "^""Successfully enabled task `"^""$taskName`"^""."^""; }; } catch { Write-Error "^""Failed to restore task `"^""$taskName`"^"": $($_.Exception.Message)"^""; $operationFailed = $true; }; }; if ($operationFailed) { Write-Output 'Failed to restore some tasks. Check error messages above.'; exit 1; }"
:: Restore scheduled task(s) to default state: `\Mozilla\Firefox Default Browser Agent D2CEEC440E2074BD`
PowerShell -ExecutionPolicy Unrestricted -Command "$taskPathPattern='\Mozilla\'; $taskNamePattern='Firefox Default Browser Agent D2CEEC440E2074BD'; $shouldDisable =  $false; Write-Output "^""Enabling tasks matching pattern `"^""$taskNamePattern`"^""."^""; $tasks = @(Get-ScheduledTask -TaskPath $taskPathPattern -TaskName $taskNamePattern -ErrorAction Ignore); if (-Not $tasks) { Write-Warning ( "^""Missing task: Cannot enable, no tasks matching pattern `"^""$taskNamePattern`"^"" found."^"" + "^"" This task appears to be not included in this version of Windows."^"" ); exit 0; }; $operationFailed = $false; foreach ($task in $tasks) { $taskName = $task.TaskName; if ($shouldDisable) { if ($task.State -eq [Microsoft.PowerShell.Cmdletization.GeneratedTypes.ScheduledTask.StateEnum]::Disabled) { Write-Output "^""Skipping, task `"^""$taskName`"^"" is already disabled, no action needed."^""; continue; }; } else { if (($task.State -ne [Microsoft.PowerShell.Cmdletization.GeneratedTypes.ScheduledTask.StateEnum]::Disabled) -and ($task.State -ne [Microsoft.PowerShell.Cmdletization.GeneratedTypes.ScheduledTask.StateEnum]::Unknown)) { Write-Output "^""Skipping, task `"^""$taskName`"^"" is already enabled, no action needed."^""; continue; }; }; try { if ($shouldDisable) { $task | Disable-ScheduledTask -ErrorAction Stop | Out-Null; Write-Output "^""Successfully disabled task `"^""$taskName`"^""."^""; } else { $task | Enable-ScheduledTask -ErrorAction Stop | Out-Null; Write-Output "^""Successfully enabled task `"^""$taskName`"^""."^""; }; } catch { Write-Error "^""Failed to restore task `"^""$taskName`"^"": $($_.Exception.Message)"^""; $operationFailed = $true; }; }; if ($operationFailed) { Write-Output 'Failed to restore some tasks. Check error messages above.'; exit 1; }"

Support

This website relies on your support.

Support now

Your donation helps keep the project alive and improves its content ❤️.

Share this page:

EmailLinkedInXRedditFacebookPinterestWhatsAppTelegramWeiboVK