Example: setting up Torbrowser

This guide will show you how to setup bubblejail to run Tor browser.

First create a new generic instance tor_browser. Generic profile provides access to the most commonly used resources such as windowing system (both X11 and Wayland) and sound.

[username@hostname ~] bubblejail create --no-desktop-entry --profile generic tor_browser

Next run a terminal inside sandbox. Most terminal applications should work (alacritty, foot, konsole) with exception of GNOME Terminal which requires full access to D-Bus.

[username@hostname ~] bubblejail run tor_browser alacritty

A terminal window should open. This terminal will be inside sandbox.

Now it is time to download Torbrowser from the official website using the sandboxed terminal. This guide downloads the latest Torbrowser version as of 2024-03-02. Check the official website for a more recent version.

[sandbox ~] wget 'https://www.torproject.org/dist/torbrowser/13.0.10/tor-browser-linux-x86_64-13.0.10.tar.xz'
HTTP request sent, awaiting response... 200 OK
Length: 114603108 (109M) [application/x-xz]
Saving to: ‘tor-browser-linux-x86_64-13.0.10.tar.xz’

The wget saved the Torbrowser archive to the sandbox home folder. Now it is time to unpack it.

[sandbox ~] tar --verbose --extract --file ./tor-browser-linux-x86_64-13.0.10.tar.xz

By default the Tor browser archive contains a tor-browser folder. Test that Tor browser can launch directly from shell.

[sandbox ~] cd tor-browser
[sandbox ~] ./start-tor-browser.desktop

Tor browser should launch.

Integrating desktop entry

When Tor browser is first launched it will create a desktop entry at ~/.local/share/applications/. However, this folder is from the perspective of sandbox so it won't run from the desktop environment.

All sandboxed directories are usually located in ~/.local/share/bubblejail/instances/<instance_name>/home/ folder where <instance_name> is the name of the instance. (tor_browser in this example)

Bubblejail provides a tool to modify the desktop entries of an application, however, it can't automatically modify the absolute paths used in Tor browser's desktop entry. This has to be manually edited.

First, make bubblejail modify and save the Tor browser's desktop entry:

[username@hostname ~] bubblejail generate-desktop-entry --desktop-entry ~/.local/share/bubblejail/instances/tor_browser/home/.local/share/applications/start-tor-browser.desktop  tor_browser

Notice how the path should be a combination of path to sandboxed home and path relative to sandboxed home to the desktop entry.

The new desktop entry should became available to the desktop environment

However, the icon will be broken because the path to icon in the desktop entry is relative to the sandboxed home.

To fix this manualy edit the desktop entry's Icon value.

[username@hostname ~] nano ~/.local/share/applications/start-tor-browser.desktop

Change

Icon=/home/username/tor-browser/Browser/browser/chrome/icons/default/default128.png

To:

Icon=/home/username/.local/share/bubblejail/instances/tor_browser/home/tor-browser/Browser/browser/chrome/icons/default/default128.png

And update the desktop entries database:

[username@hostname ~] update-desktop-database ~/.local/share/applications/

Now the Tor browser desktop entry should display the proper icon.