MrOtherGuy/firefox-csshacks
Some data may be outdated — see provenance labels.
Collection of userstyles affecting the browser observed · 2026-09-22
Health v2 · maintenance only
75/100
- Activity 96
- Release rhythm 35
- Longevity 100
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-10-21. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 2921
- days_rel: n/a
- days_push: 29
- n_releases_24m: 0
Adoption not part of the score
4519 stars · 368 forks observed · 2026-09-22
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
A collection of self-contained CSS stylesheets (userChrome.css/userContent.css hacks) for customizing the appearance of Mozilla Firefox. Users mix and match individual styles by placing them in their Firefox profile's chrome folder.
Use cases
- customize the Firefox user interface with CSS
- hide or restyle Firefox toolbar and tab bar elements
- make Firefox look like a different browser
- apply custom themes to Firefox without extensions
- modify appearance of web pages via userContent.css
- tweak Firefox window controls and titlebar styling
When to choose
- you want fine-grained control over Firefox's UI appearance without writing an extension
- you need small, mix-and-match CSS tweaks for specific Firefox interface elements
- you are comfortable editing your Firefox profile and about:config preferences
When to avoid
- you want a one-click theme or extension-based customization
- you need styles guaranteed to work across all operating systems and Firefox versions
- you want guaranteed compatibility with third-party Firefox styles
Facets
plugin · maturity active
theme ui-components developer-tools browser-extensions web-design developer-tools browser windows cross-platform firefox css userchrome userstyles browser-customization ui-tweaks linux macos
1 source
- readme: https://github.com/MrOtherGuy/firefox-csshacks · fetched 2026-09-22 · 0ea37054f03d
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| MrOtherGuy/firefox-csshacks | main | 75 |
For agents
markdown · JSON · MCP: product_card(name="MrOtherGuy/firefox-csshacks")
Data as of 2026-10-19T08:05:51.212177+00:00 · Report a problem