How to configure and install Mozilla FireFox on Debian 11 Bullseye – Guide

Debian uses Firefox ESR as its default browser. It is very useful for school or business use. Although, for personal computers or those who choose the latest features, Mozilla offers the “Rapid release” channel with updates every month!

Option #1: Install the latest stable Firefox (not ESR) on Debian using Flathub’s Firefox flatpak package

With Firefox 75, Mozilla’s browser has gained support for the Flatpak platform and is now available from the Flathub repository. This can be used on many Linux distributions, including any version of Debian. ..

Firefox installed from a flatpak package is protected, which can cause some issues with accessing local files and opening files with external applications. However, the restricted area also offers better security. ..

1. To install this Firefox package, the first thing to do is install flatpak, if you haven’t already:

2. If you use the GNOME Software application, you can also install the flatpak plugin for it (this allows you to browse flatpak applications and update them):

3. Then add the Flathub repository using:

5. You can now install the latest Firefox (not ESR) on Debian using:

Option #2: Install the latest version of Firefox on Debian Stable or Test using the Debian Unstable repository

The Debian unstable branch is where packages go after their maintainer loads them and they are released for release by the FTP master. This is where packages go after their maintainer has tested them and found them to be stable. The name “unstable” does not necessarily mean that the packages are unstable, but that they are less tested.

Debian 10 Buster (Stable) and Testing (Bullseye) only have Firefox ESR in their repositories, while Debian Unstable has the latest normal version of Firefox and Firefox ESR. ..

Debian-specific patches make Firefox more stable and efficient.

To add the Debian Unstable repository to Debian Stable or Testing:

  1. Log in to your Debian account.
  2. Type “apt-get update” to get the latest package lists.
  3. Type “apt-get install debian-unstable” to install the Unstable repository into your Debian system.
  4. To set a low pin priority for the Unstable repository:
  5. Type “apt-get pin -p unstable” to set a low pin priority for the Unstable repository so that it cannot be automatically installed unless you specify this manually.

Debian unstable is a testing branch of Debian that is not automatically installed on systems. You will need to install it manually if you want to use it. This article also contains instructions to completely undo this.

1. Add the Debian Unstable repository in Debian 10 Buster (Stable) or Debian Bullseye (Testing).

apt-get update

apt-get install linux-headers-$(uname -r) linux-libc-$(uname -r)

apt-get install linux-image-$(uname -r) linux-modules-$(uname -r)

At the final of this file, I will add a new line.

After adding this, the text editor will show a warning about a security vulnerability. To continue working with the file, you will need to open it in a different text editor or risk having your data stolen.

2. Set a low pin priority for the Debian Unstable repository so that your system does not automatically install packages unless you specify this manually.

sudo nano /etc/apt/preferences.d/99pin-unstable Add the following line to the file: Package: pin-unstable Pin-Priority: 100 Save and close the file. As a regular user, open a terminal window and type: sudo nano /etc/apt/preferences.d/99pin-unstable Add the following line to the file:Package: pin-unstablePin-Priority: 100Save and close the file. ..

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After adding this, the text editor will show a warning about a security vulnerability. To continue working with the file, you will need to open it in a different editor such as Notepad or Word.

The unstable Pin has a priority of 10, which means that it will be released before any other pins. ..

3. Install the latest regular Firefox (not ESR) on Debian 10 Buster (Stable) or Testing (Bullseye).

sudo apt-get install firefox sudo apt-get install bullseye

Final note

This guide will show you how to configure and install Mozilla Firefox on Debian 11 Bullseye. If you have any questions about this article, please ask us. Additionally, please share your love by sharing this article with your friends.