How to Install Mozilla Firefox 135 on Linux

Mozilla Firefox 135 has landed, bringing performance improvements, security patches, and minor UI tweaks. If you’re using Linux and want the latest version right away, this guide walks you through the installation step by step.

Method 1: Install via Mozilla’s Official Tarball (Works on Most Distros)

This method bypasses your distro’s software repository and uses the official Firefox package.

Step 1: Download Firefox 135

Open a terminal and run:

wget https://download.mozilla.org/?product=firefox-135.0-SSL&os=linux64&lang=en-US -O firefox.tar.bz2

Step 2: Extract the Archive

tar -xjf firefox.tar.bz2

This creates a folder named firefox in your current directory.

Step 3: Move Firefox to /opt (Optional but Recommended)

sudo mv firefox /opt/firefox135

Step 4: Create a Symlink

sudo ln -s /opt/firefox135/firefox /usr/local/bin/firefox135

Now you can launch Firefox 135 by typing firefox135 in the terminal.

Step 5: Optional – Add to Application Menu

Create a desktop entry so it shows up in your app launcher.

nano ~/.local/share/applications/firefox135.desktop

Paste this:

[Desktop Entry]
Name=Firefox 135
Exec=/usr/local/bin/firefox135
Icon=/opt/firefox135/browser/chrome/icons/default/default128.png
Type=Application
Categories=Network;WebBrowser;

Save and close (Ctrl+O, Enter, then Ctrl+X).

Method 2: Using Flatpak (For Sandboxed Install)

If you prefer Flatpak:

flatpak install flathub org.mozilla.firefox

To ensure you’re running the latest version:

flatpak update org.mozilla.firefox

Note: Flatpak updates might lag a day or two behind the official release.

New to Flatpak? Here’s a guide to How to Install and Run Flatpak Applications

Method 3: Using Your Package Manager (Might Be Delayed)

On Ubuntu/Debian:

sudo apt update && sudo apt install firefox

On Fedora:

sudo dnf install firefox

On Arch:

sudo pacman -Syu firefox

These will install Firefox 135 only if your distro has updated its repo, which can take time.

Bonus: Use Snap (If You Prefer Canonical’s Package System)

Snap packages offer an easy way to install Firefox with automatic updates.

sudo snap install firefox

Need help setting up Snap? Check out How to Install snap in Linux

Final Tip

Running multiple versions? You can install Firefox 135 manually while keeping your distro’s version. Just make sure to use separate profiles or run with --no-remote -P to avoid conflicts.

Conclusion

Firefox 135 brings valuable updates, and on Linux, you’re not stuck waiting for your distro’s update cycle. Use the method that fits your setup best, and enjoy the latest Firefox features right away.