r/FirefoxCSS
ActiveFirefox CSS
1. Post must have flair! Post must have flair. If your problem is solved, please *change the flair to 'Solved'*. 2. When Posting for Help or Code to Share. For Help: Post your code and/or the link to the theme you're using. paste your code into a code block by preceding each line of code with four spaces Or copy your code, paste it at [Pastebin](https://pastebin.com/), and post the link here For code to share: use [pastebin](https://pastebin.com/) or a Git Repo to share your code do not post links to compressed files 3. Stay on topic. Posts and comments should be about customizing the Firefox UI with CSS. Custom themes that include javascript or require installing a user script is not allowed. 4. Be civil. Be civil. Bear in mind that many users come here for help and would be turned off by insults and rudeness. 5. No previews or advertising. Don't post screenshots of CSS modifications or themes unless you also post the code or link to them. 6. Discussion is limited to the Firefox browser only. Questions about modifying other browsers should be directed to their subreddits, e.g. r/Floorp, r/LibreWolf, etc. 7. Do not delete your post. Don't delete your posts whether or not you got a solution. All posts are a valuable source for everyone to learn from one way or the other.
Members
32,004
as of February 2025
Last post
today
September 28, 2026
Posts (30 days)
100+
Created
2017
September 2, 2017
Total posts
18.3K
archived
Total comments
96.8K
archived
Is r/FirefoxCSS dead? Active community.
r/FirefoxCSS is posting regularly — the latest post was today. Active subreddits can't be requested through r/redditrequest.
Find abandoned subreddits in this niche you can claim →r/FirefoxCSS activity over the last year
New posts per month.
Frequently asked questions about r/FirefoxCSS
How many members does r/FirefoxCSS have?
r/FirefoxCSS had 32,004 members as of February 2025, the most recent archive crawl of its subscriber count.
Is r/FirefoxCSS dead?
No. r/FirefoxCSS is active — the most recent post was today, with 100+ posts in the last 30 days.
When was r/FirefoxCSS created?
r/FirefoxCSS was created on September 2, 2017.
Can I take over r/FirefoxCSS?
Probably not. r/FirefoxCSS is still in active use, and Reddit only hands over communities whose human moderators have all gone inactive on Reddit for 60+ days. If you want a community in this niche, look for abandoned subreddits on the same topic instead — DeadSubs finds them automatically.
Want your own subreddit with a built-in audience?
Thousands of subreddits like r/FirefoxCSS have been abandoned by their moderators. DeadSubs finds the ones you can claim.
Activity checked September 28, 2026from the Arctic Shift Reddit archive. Member counts come from the archive's most recent crawl and may lag Reddit. DeadSubs is not affiliated with Reddit Inc.