Introduction

caelestia-tab is a browser extension, plus a small Rust helper, for people who run the caelestia desktop. It gives you:

• a new tab whose colours and background follow caelestia’s current scheme and wallpaper, and change live when you switch;
• bookmarks on a grid you define yourself, with images or solid scheme colours;
• the catppuccin/userstyles site themes (134 sites), recoloured with the live scheme instead of a Catppuccin flavour;
• the scheme on every page as --caelestia-* CSS variables, for your own Stylus styles and userscripts.

It works in Firefox and Firefox-based browsers (Floorp, Zen, LibreWolf, Waterfox). The browser’s own window frame is out of scope: CaelestiaFox already recolours that, and the two work side by side.

Everything on the new tab is a plugin, the built-in widgets included. IDEAS.md holds the plans for what comes next.