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Junction lets you choose the application to open files and links.


Download on Flathub


Set Junction as the default application for a resource and let it do the rest. Junction will pop up and offer multiple options to handle it.

Set Junction as default browser xdg-settings set default-web-browser re.sonny.Junction.desktop
Set Junction as default for all files xdg-mime default re.sonny.Junction.desktop x-scheme-handler/file

Please note that this may not be respected by all applications but the command xdg-open will.

Set Junction as default for png xdg-mime default re.sonny.Junction.desktop image/png
Set Junction as default email composer xdg-settings set default-url-scheme-handler mailto re.sonny.Junction.desktop
Set Junction as default folder opener xdg-mime default re.sonny.Junction.desktop inode/directory

Junction has a very simple API that doesn't require any programming. To open any resource with Junction, even if it's not configured as the default application, simply use the following URI format x-junction://$RESOURCE. For examples

  • x-junction://
  • x-junction://~
  • x-junction://file:///etc/os-release
  • x-junction:///etc/os-release

You can use this in web pages, the terminal, native applications and anything that is able to open URIs.

If Junction is installed - you can test this in the terminal with xdg-open "x-junction://file:///etc/os-release" and in the browser with <a href="x-junction://file:///etc/os-release">Test Junction URI</a>.

Tips and tricks

Keyboard navigation

Use the menu or <Ctrl>? to learn about Keyboard usage. You can navigate the UI with the arrow keys too.

Open with multiple applications

Use Middle-click, Ctrl+Click, Ctrl+Enter or Ctrl+Space to keep Junction open - allowing you to open the resource in multiple applications.

Make Junction appear in the center of the screen

On GNOME you can make all new windows open in the center using

gsettings set org.gnome.mutter center-new-windows true


Use Junction from the terminal

Create a permant alias, for example alias open="flatpak run re.sonny.Junction".

Then you can use open my-file.

See How To Create Permanent Aliases In Linux?

Add custom scripts to Junction

You can add your own script to Junction by creating a .desktop file for it in ~/.local/share/applications.

See (distro agnostic).

Browser integration

Create a bookmark with the following URL

Multiple Firefox profiles

See Profile Manager - Create, remove or switch Firefox profiles

If you want to be able to choose the Firefox profile to open the resource with, you can make desktop files for your Firefox profiles in ~/.local/share/applications.

Here is an example ~/.local/share/applications/firefox-work.desktop

[Desktop Entry]
Name=Firefox work
Exec=firefox -P work --class=firefox-work %u

Save, run update-desktop-database ~/.local/share/applications, enjoy.


Environment variables in desktop files
# Before
Exec=firefox %u
# After
Exec=env MOZ_USE_XINPUT2=1 firefox %u


I can't distinguish between options with the same icon

Within Junction, you can toggle Show names in the menu or hover the application with the mouse to display a tooltip.

Otherwise, you can edit the desktop files to use distinctive icons, here are a some tools

My app doesn't show up

If the application was installed via Flatpak, the package manager or an other conventional way, feel free to open an issue.

Make sure the application desktop file has a MimeType key that matches the type of resource you want it to handle. For example if you want the application ~/.local/share/applications/my-custom-browser.desktop to handle web content; add the following MimeType=text/html;text/xml;application/xhtml+xml;text/mml;x-scheme-handler/http;x-scheme-handler/https;.

The desktop filename should be unique. Junction can't display both /usr/share/applicatins/firefox.desktop and ~/.local/share/applications/firefox.desktop. The second overrides the first.

Finally - make sure to run update-desktop-database ~/.local/share/applications after installing a desktop file.

Where are desktop files located ?
  • System /usr/share/applications
  • User ~/.local/share/applications
  • Flatpak system /var/lib/flatpak/exports/share/applications/
  • Flatpak user ~/.local/share/flatpak/exports/share/applications/

In the media - Nifty and useful app switcher called Junction - 05/2022 - 03/2022 - Junction 1.4 | Choose the application to open files and links - 12/2021 - Episode 433 The Lessons of Jellyfin - 11/2021


If you'd like to help translating Junction into your language, please head over to Weblate.

Translation status

Thank you for your help!


cd Junction
npm install
make dev

Make changes and press <Primary><Shift>Q on the Junction window to restart it.

Use <Primary><Shift>I to open the inspector.

To pass the tests you have to install a few dependencies

# Install development dependencies
sudo dnf install --assumeyes npm flatpak make desktop-file-utils gjs gtk4-devel libadwaita-devel
cd Junction
npm install
flatpak remote-add --user --if-not-exists flathub
flatpak install --user --assumeyes --noninteractive flathub org.freedesktop.appstream-glib

# Run tests
make test


# To update the pot file
# xgettext -f po/POTFILES -o po/re.sonny.Junction.pot --no-wrap -cTRANSLATORS --from-code=UTF-8
# sed -i "s/Project-Id-Version: PACKAGE VERSION/Project-Id-Version: re.sonny.Junction/" po/re.sonny.Junction.pot
meson compile re.sonny.Junction-pot -C build

# To create a translation
# msginit -i po/re.sonny.Junction.pot -o po/fr.po -l fr_FR.UTF-8
echo -n " fr" >> po/LINGUAS
meson compile re.sonny.Junction-update-po -C build

# To update translations
# msgmerge -U po/*.po po/re.sonny.Junction.pot
meson compile re.sonny.Junction-update-po -C build

See sonnyp/Commit#14 (comment)

Publish new version
  • update metainfo and screenshot
  • meson compile re.sonny.Junction-pot -C build
  • meson compile re.sonny.Junction-update-po -C build
  • Update version in
  • git tag
  • flathub


cd Junction
meson --prefix $PWD/install build
ninja -C build install

Use GNOME Builder or

cd Junction
flatpak-builder --user --force-clean --repo=repo --install-deps-from=flathub flatpak re.sonny.Junction.json
flatpak --user remote-add --no-gpg-verify --if-not-exists Junction repo
flatpak --user install --reinstall --assumeyes Junction re.sonny.Junction



~/.local/bin must be in $PATH

cd Junction
meson --prefix ~/.local build
ninja -C build install
cd Junction
meson build
ninja -C build install
cd Junction
ninja -C build uninstall


© 2021-2022 Sonny Piers


GPLv3. Please see COPYING file.