How to Install Firefox Nightly on Linux Mint 21 or 20

Exploring the advanced features of Firefox Nightly offers an exciting glimpse into the future of web browsing. This guide will demonstrate how to install Firefox Nightly on Linux Mint 21 or 20, enabling you to experience the forefront of Mozilla’s innovations. Firefox Nightly, an experimental version of the widely used Mozilla Firefox browser, is renowned for its early access to new functionalities.

As we delve into the process, let’s first spotlight the distinctive aspects of Firefox Nightly:

  • Experimental Features: Firefox Nightly is a testing ground for new functionalities, showcasing the latest developments before they reach the broader audience.
  • Ideal for Early Adopters: This version is tailor-made for those who revel in being the first to explore and test cutting-edge browser capabilities.
  • Feedback and Development: It serves as a vital platform for users to contribute feedback, helping shape the future of the browser.
  • Expect the Unexpected: Due to its nature, users might encounter occasional instability, which is integral to the testing process.

Linux Mint, known for its user-friendly approach, provides a stable foundation for running Firefox Nightly. The subsequent sections will guide you through each step to ensure a seamless installation on your Linux Mint system. By the end of this guide, you’ll have Firefox Nightly up and running, ready to explore its latest advancements.

Import Firefox Nightly PPA on Linux Mint 21 or 20

Step 1: Import Ubuntu Mozilla Team Firefox Nightly PPA

To start, you’ll need to import the Firefox Nightly PPA (Personal Package Archive) provided by the Ubuntu Mozilla Team. This step is crucial as it incorporates the repository containing the Nightly builds into your system’s package sources.

Run the following command in your terminal:

sudo add-apt-repository ppa:ubuntu-mozilla-daily/ppa -y

Executing this command will add the Firefox Nightly PPA to your Linux Mint system. This action enables your system to access and install the most current Nightly versions of the Firefox browser directly from this repository.

Step 2: Refresh APT Package Index

Before installing Firefox Nightly, it’s essential to refresh your system’s APT package index. This ensures that your system is aware of the latest available packages, including the Firefox Nightly build.

To update your APT package index, execute:

sudo apt update

This command synchronizes the package index files from their sources, integrating the Firefox Nightly PPA into your system. As a result, your system can access the latest Nightly builds.

Upon installing Firefox Nightly, it will coexist with other Firefox installations on your system, such as the standard Firefox or Firefox Beta versions, if they are present. This feature allows you to test Nightly builds while maintaining your current Firefox setup.

Additionally, there’s no need for APT Pinning, as Firefox Nightly and other Firefox versions maintain separate installations.

Install Firefox Nightly on Linux Mint 21 or 20

Step 1: Install Firefox Nightly via APT Command

Ensure that all Firefox instances are closed before proceeding with the installation. To install Firefox Nightly, enter the following command:

sudo apt install firefox-trunk

This command will initiate the installation of Firefox Nightly from the PPA. It replaces any existing Firefox installation with the Nightly build, providing you with the latest developmental features of the browser.

Step 2: Verify the Firefox Nightly Installation

After installation, it’s crucial to verify that the correct version of Firefox Nightly is installed on your system. Use the following command to check the installed version:

firefox-trunk --version

The output should resemble:

Mozilla Firefox xx.xa1

Notice the “a1” in the version number, which signifies that the installed Firefox is indeed a Nightly build. This verification step is important to confirm that your system is now running the intended Nightly version, allowing you to explore the newest features and developments of Firefox.

Launch Firefox Nightly on Linux Mint

CLI Command to Launch Firefox Nightly

After successfully installing Firefox Nightly, you can launch it directly from the command line interface (CLI). This method is especially useful for users who prefer working within a terminal environment.

To open Firefox Nightly via the terminal, enter the following command:


This command launches the installed version of Firefox, which is now the Nightly build, in a new browser window.

GUI Method to Launch Firefox Nightly

If you prefer a graphical approach, Firefox Nightly can also be launched from the application menu of Linux Mint. This method is user-friendly and intuitive, particularly for those who are more comfortable with a GUI. To start Firefox Nightly using the GUI, follow these steps:

  1. Click on the Taskbar.
  2. Navigate to the Internet section.
  3. Select Firefox Nightly.
Firefox Nightly icon in Linux Mint taskbar UI menu
Click to Launch Firefox Nightly on Linux Mint

Getting Started with Firefox Nightly on Linux Mint 21 or 20

This section will explore tips and customizations to help you get the most out of Firefox Nightly on Linux Mint.

General Tips for Firefox Nightly on Linux Mint

  • Stay up-to-date: Since Firefox Nightly is updated regularly with new features and bug fixes, it’s essential to keep your browser up-to-date. You can update your Nightly build by navigating to the Firefox menu > Help > About Firefox. The browser will automatically check for updates and prompt you to restart if a new version is available.
  • Report bugs and issues: As an experimental build, Firefox Nightly may have some instability or bugs. If you encounter any issues, report them to the Mozilla team through the built-in Bug Report feature. You can access this by clicking the Firefox menu > Help > Submit Feedback.
  • Enable experimental features: Firefox Nightly includes experimental features that might not be available in the stable version. To enable these features, enter about:config in the address bar, and search for the desired feature. Keep in mind that some experimental features might not be stable or fully functional.

Customization Tips for Firefox Nightly on Linux Mint 21 or 20

  • Customize the toolbar: Tailor the Firefox Nightly toolbar to your preferences by adding or removing buttons, such as bookmarks, downloads, or home. To customize the toolbar, right-click on an empty area of the toolbar and select Customize. You can then drag and drop buttons as desired.
  • Manage add-ons: Enhance your browsing experience with add-ons, which are available through the Add-ons Manager. To access the Add-ons Manager, click the Firefox menu > Add-ons. You can search for and install add-ons, manage your installed add-ons, and access the add-on settings from this interface.
  • Choose a theme: Change the appearance of Firefox Nightly by selecting a theme. Go to the Firefox menu > Add-ons > Themes. You can choose from several built-in themes or explore additional themes from the Mozilla Add-ons website.

Other Tips for Firefox Nightly on Linux Mint 21 or 20

  • Use the Firefox Profiler: The Firefox Profiler is a built-in performance analysis tool that helps you identify and address performance issues. To access the Profiler, enter about:profiling in the address bar, and follow the on-screen instructions to start a profiling session.
  • Enable or disable multi-process mode: Firefox Nightly supports multi-process mode, which can improve performance by running web content and the user interface in separate processes. To enable or disable this feature, enter about:config in the address bar, and search for browser.tabs.remote.autostart. Toggle the value to true (enabled) or false (disabled) as desired.
Firefox Nightly running on Linux Mint 21/20 desktop
Firefox Nightly in Action on Linux Mint Desktop

Managing Firefox Nightly on Linux Mint 21 or 20

Remove Firefox Nightly from Linux Mint

In scenarios where Firefox Nightly no longer meets your needs, you can easily remove it from your Linux Mint system and revert to the stable version of Firefox. Follow these straightforward steps for removal:

Step 1: Uninstall Firefox Nightly

Begin by uninstalling Firefox Nightly. This step ensures that the Nightly build and its components are completely removed from your system.

Execute the following command in the terminal:

sudo apt remove firefox-trunk

This command cleanly uninstalls Firefox Nightly, removing the specific version of the browser associated with the Nightly builds.

Step 2: Remove Firefox Nightly PPA

Next, it’s important to remove the Firefox Nightly PPA from your system’s list of repositories. This prevents your system from accessing future Nightly builds. Use the command below to remove the PPA:

sudo add-apt-repository --remove ppa:ubuntu-mozilla-daily/ppa -y

Running this command deletes the Firefox Nightly PPA, ensuring that your system’s package manager no longer fetches updates from this repository.

Step 3: Refresh APT Package Index

Finally, update your APT package index to reflect these changes. This step is crucial for maintaining the accuracy and consistency of your system’s package information.

Enter the following command:

sudo apt update

By refreshing the APT package index, your system acknowledges the removal of the Firefox Nightly PPA and updates its package listings accordingly.

Conclusion: Installing Firefox Nightly on Linux Mint

In conclusion, our guide has taken you through the seamless process of installing, launching, managing, and, if needed, uninstalling Firefox Nightly on Linux Mint 21 or 20. Whether you’re a developer, tech enthusiast, or just curious about the latest browser-features, Firefox Nightly offers a unique window into the future of web browsing. Remember, while Nightly provides cutting-edge updates, it’s essential to consider its experimental nature for daily use. For a stable browsing experience, reverting to the standard Firefox version is always an option.

Overall, the guide ensures you have the flexibility and know-how to navigate between these versions, enhancing your Linux Mint experience.

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