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Register Firefox Portable with Default Apps or Default Programs in Windows

Mozilla Firefox®, Portable Edition is the popular Mozilla Firefox web browser bundled with a Launcher as a portable app, so you can take your bookmarks, extensions, and saved passwords with you.

This article lists two methods with which you can register Mozilla Firefox Portable Edition with Default Apps or Default Programs in Windows Vista through Windows 10/11.

Register Firefox Portable with Default Apps

Method 1: Using a VBScript

  1. Download the script firefoxportable.vbs.
  2. Save the script to the same folder as FirefoxPortable.exe. It’s an important step.
  3. To add/register Firefox Portable with Default Apps or Default Programs, double-click firefoxportable.vbs
  4. In the input box, type REGISTER, and click OK.

That’s it! Firefox Portable is now listed on Default Apps

You can customize the default app name by which the program appears in Default Apps or Default Programs. To do so, use Notepad and edit the ApplicationName value data in line 120 of the VBScript.

Method 2: Using a standalone utility

This method was originally written for Windows Vista but works on all versions of Windows. However, you need to install the legacy version of .Net Framework on Windows 10/11 for this program to work.

  1. Download and save it to Desktop.
  2. Unzip the archive and extract the contents to a folder.
  3. Double-click the file RegisterFirefoxPortable.exe to run it.
  4. When you see the User Account Control dialog, click Allow.
  5. Click the Browse button and locate the Firefox Portable executable
  6. Click Register

Firefox Portable is now registered with the Default Programs applet.

As you can see, “Mozilla Firefox, Portable Edition” entry is now listed on the Default Apps page in Windows 10 Settings. You’ll need to manually click on the web browsers entry in Default Apps and select “Mozilla Firefox, Portable Edition” to set it as default.

Firefox Portable registered with Default Apps

Editor’s note: If the drive letter for your removable device (which contains Firefox Portable) changes, you’ll need to re-register the program using the above script or utility.

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