A CSS theme that makes Thunderbird look and feel like a native GNOME application.
Thunderbird GNOME theme is a CSS-based theme that modifies the Thunderbird email client's user interface to match the visual style of GNOME desktop applications. It solves the visual inconsistency problem for Linux users who want their email client to blend seamlessly with the rest of their GNOME environment. The theme is applied via user profile customizations without altering Thunderbird's core code.
Linux users, especially those on GNOME-based distributions like Ubuntu, Fedora, or Pop!_OS, who use Thunderbird and desire a native-looking desktop application suite.
Developers choose this theme because it provides a polished, native GNOME experience for Thunderbird, is easy to install via scripts, and is maintained alongside GNOME design updates. It's a lightweight, non-invasive way to improve desktop integration.
A GNOME👣 theme for Thunderbird📨
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Follows GNOME's latest Adwaita design guidelines for a cohesive look, as the README states it aims to make Thunderbird look closer to native GNOME apps.
Auto-install and install scripts simplify setup by detecting profiles and supporting Flatpak, with options for custom paths and themes like Adwaita or Maia.
Offers optional tweaks such as hiding the tab bar or adding active tab contrast, enabled via boolean preferences in Thunderbird's config editor.
Installation scripts handle all or specific Thunderbird profiles, ensuring theme application across different user accounts without manual duplication.
Uses CSS hacks not endorsed by Thunderbird upstream, risking breakage with updates and unsupported issues, as warned in the README disclaimer.
Requires enabling preferences like toolkit.legacyUserProfileCustomizations.stylesheets and editing boolean values for features, adding complexity for non-technical users.
Main branch only supports Thunderbird 115; older versions need specific git tags, making it inflexible for those on non-standard releases.