An elementary OS theme for Thunderbird

⬇️ Installation

For now theme installation is supported for:

1. 🐦 Thunderbird 📦 Flatpak version. Install it using AppCenter.
2. 🐦 Thunderbird 📦 download package. How to install for advanced users.

You can use Main menu to create a Thunderbird desktop entry:

• Download Thunderbird from the website and extract in a folder of your choice.
• Open Main menu (install it in AppCenter), click on the Settings wheel in the app list on the top right and select New launcher.
• Fill in each section starting with Appearance. Press the folder icon and go to your Thunderbird folder and in /chrome/icons/default select default128.png.
• In Description you can fill in Thunderbird as name of the launcher.
• In Execution and Default command you fill in your Thunderbird folder location like /home/<username>/Apps/thunderbird/thunderbird where the last "thunderbird" is the run file.
• In Visibility you can toggle Show an animation until the application is visible and Show this application in the main menu on.
• Then under that in Menu you can choose in which category the launcher is showing, like Internet.
• Save by clicking the Save button in the top bar of the window.

Now you need a dot under the Thunderbird icon when opened in the dock. Edit the desktop entry file:

• In the left list of Main menu, select Thunderbird and scroll down to Advanced section and press the icon on the right, this opens Code with the desktop entry file visible.
• Then open Thunderbird and Terminal.
• Type xprop WM_CLASS in the Terminal, the result: your mouse cursor changes into a crosshair.
• You can now click your crosshair cursor on the Thunderbird window and you will see the WM_Class of Thunderbird in Terminal.
• Go to Code and type a new line in the Desktop Entry section, something like: StartupWMClass=thunderbird, where thunderbird is the result of xprop WM_class. Code will automatically save the file so just close all and move the Thunderbird icon from Slingshot to the Dock and enjoy the fully working and integrated Thunderbird.

Use this one line install script to install theme. Just copy the line to your terminal and press enter:

bash <(wget --quiet --output-document - "https://raw.githubusercontent.com/Zonnev/elementaryos-thunderbird-theme/main/install.sh")

➕ After installation

1. In Settings > Configuration editor you can make the bottom window corners rounded by setting widget.gtk.rounded-bottom-corners.enabled to true.
2. If you installed the Flatpak version of Thunderbird and you want to make use of the elementary OS accent colors, you have to copy the usr/share/themes folder to home/.themes:
   • Type or copy-paste in Terminal mkdir -p $HOME/.themes to make the folder.
   • Then type cp -r /usr/share/themes/* $HOME/.themes/ to copy the folder and place the files in the folder you have made.
   • And after that flatpak override --user org.mozilla.Thunderbird --filesystem=$HOME/.themes to make Flatpak version follow the elementary OS style sheets in the folder.

✖️ Uninstall this theme

To uninstall this theme, do the following:

1. Go to Settings > Configuration editor, Configuration Editor is the last option in Settings.
2. Search for toolkit.legacyUserProfileCustomizations.stylesheets and put it on false. Then restart the Thunderbird: it does not show the theme anymore.

You can now delete the chrome folder(s) by doing the following:

1. Find the chrome folder(s) in ~/.var/app/org.mozilla.Thunderbird/.thunderbird/<profilefolder>/ if you installed as Flatpak, or in ~/.thunderbird/<profilefolder>/ if you installed the download package.
2. Delete the chrome folder in your profile folder(s). After this you have completely uninstalled the theme.