CosmoCreeper/Sine
The ultimate theme manager for Firefox-based browsers. observed · 2026-08-28
Health v2 · maintenance only
81/100
- Activity 99
- Release rhythm 84
- Longevity 34
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 0
- age_days: 489
- days_rel: 108
- days_push: 7
- n_releases_24m: 32
Adoption not part of the score
1380 stars · 33 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Sine is a community-driven mod and theme manager for Firefox-based browsers such as Floorp, LibreWolf, Waterfox, and Zen. It injects itself into the browser's settings page to provide an intuitive system for installing and managing themes and mods without third-party tools.
Use cases
- manage firefox themes easily
- install userchrome mods without manual setup
- customize librewolf appearance
- apply themes to zen browser
- find and install firefox mods from a community catalog
- replace manual userchrome.js installation
When to choose
- you use a Firefox-based browser and want easy theme/mod management
- you want a GUI alternative to manually editing userChrome.css or userChrome.js
- you want compatibility-aware installation of community mods
When to avoid
- you use Chromium-based browsers like Chrome or Edge
- you only need a single static theme and prefer manual CSS control
- you need a Firefox WebExtension add-on rather than a bootloader-based mod system
Facets
application · maturity active
theme plugin-system developer-tools browser-extensions web-development desktop-applications developer-tools browser cross-platform windows firefox theme-manager userchrome userchromejs floorp librewolf waterfox zen-browser browser-customization mods macos linux
1 source
- readme: https://github.com/CosmoCreeper/Sine · fetched 2026-08-28 · 444d3a834575
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| CosmoCreeper/Sine | main | 81 |
For agents
markdown · JSON · MCP: product_card(name="CosmoCreeper/Sine")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem