Subreddits similar to r/firefox

423k subs

All things Linux and GNU/Linux -- this is neither a community exclusively about the kernel Linux, nor is exclusively about the GNU operating system.
https://reddit.com/r/linux/

r/Ubuntu

124k subs

The Ubuntu community on Reddit
https://reddit.com/r/Ubuntu/

r/Windows10

186k subs

This community is dedicated to Windows 10 which is a personal computer operating system released by Microsoft as part of the Windows NT family of operating systems.
https://reddit.com/r/Windows10/

r/privacy

531k subs

The intersection of technology, privacy, and freedom in a digital world.
https://reddit.com/r/privacy/

r/programming

2m subs

Computer Programming
https://reddit.com/r/programming/

r/Android

2m subs

Android news, reviews, tips, and discussions about rooting, tutorials, and apps. Generic discussion about phones/tablets is allowed, but technical-support and carrier-related issues should be asked in their respective subreddits!
https://reddit.com/r/Android/

r/windows

111k subs

Windows is a personal computer operating system released by Microsoft as part of the Windows NT family of operating systems.
https://reddit.com/r/windows/

r/archlinux

100k subs

For users of the much loved Linux distro, Arch Linux.
https://reddit.com/r/archlinux/

r/linuxquestions

107k subs

https://reddit.com/r/linuxquestions/

r/chrome

57k subs

https://reddit.com/r/chrome/

r/unixporn

182k subs

Submit screenshots of all your *NIX desktops, themes, and nifty configurations, or submit anything else that will make ricers happy. Maybe a server running on an Amiga, or a thinkpad signed by Bjarne Stroustrup? Show the world how sexy your computer can be!
https://reddit.com/r/unixporn/

r/linuxmasterrace

146k subs

A subreddit for Linux enthusiasts.
https://reddit.com/r/linuxmasterrace/

r/linux_gaming

110k subs

A subreddit for gaming on the GNU/Linux operating system.
https://reddit.com/r/linux_gaming/

r/androidapps

174k subs

A subreddit dedicated to Android apps.
https://reddit.com/r/androidapps/

r/privacytoolsIO

52k subs

Providing tools and knowledge to protect your privacy against global, mass surveillance.
https://reddit.com/r/privacytoolsIO/

r/kde

31k subs

KDE is an international technology team creating user-friendly free and open source software for desktop and portable computing. KDE's software runs on GNU/Linux, BSD and other operating systems, including Windows.
https://reddit.com/r/kde/

r/linux4noobs

133k subs

Linux introductions, tips and tutorials. Questions are encouraged. Any distro, any platform! Explicitly noob-friendly.
https://reddit.com/r/linux4noobs/

r/Piracy

422k subs

A community dedicated to the discussion of digital piracy.
https://reddit.com/r/Piracy/

r/uBlockOrigin

12k subs

An efficient blocker add-on for various browsers. Fast, potent, and lean.
https://reddit.com/r/uBlockOrigin/

r/sysadmin

374k subs

A reddit dedicated to the profession of Computer System Administration.
https://reddit.com/r/sysadmin/

r/webdev

376k subs

A community dedicated to all things web development: both front-end and back-end. For more design-related questions, try /r/web_design.
https://reddit.com/r/webdev/

r/opensource

89k subs

A subreddit for everything [open source](http://en.wikipedia.org/wiki/Open_source) related.
https://reddit.com/r/opensource/

r/AndroidQuestions

57k subs

The place to get help for any problems you have related to your Android device and the Android ecosystem.
https://reddit.com/r/AndroidQuestions/

r/LineageOS

47k subs

Your Lineage will finish what you started, Cid.
https://reddit.com/r/LineageOS/

r/google

714k subs

For news and announcements from and about Google
https://reddit.com/r/google/

r/Steam

677k subs

A subreddit for members of the Steam Community.
https://reddit.com/r/Steam/

r/techsupport

636k subs

Stumped on a Tech problem? Ask the tech support reddit, and try to help others with their problems as well. Be sure to check out the live chat, too! https://techsupport.dev0.sh
https://reddit.com/r/techsupport/

r/netsec

327k subs

A community for technical news and discussion of information security and closely related topics.
https://reddit.com/r/netsec/

r/software

75k subs

https://reddit.com/r/software/

r/FirefoxCSS

5k subs

A place for Firefox customization.
https://reddit.com/r/FirefoxCSS/