The latest stable releases of Chrome, Firefox, Opera and Opera Mobile are supported.

Install 4chan X

Using Opera? Install Opera 12+ (currently in beta). Why?

1. Install 4chan X, that's it.

1. If you don't have Scriptish installed:
   1. Install Scriptish.
   2. Restart Firefox.
2. Install 4chan X.

1. If you haven't set your userscripts folder:
   1. Go to Preferences (Ctrl + F12) → Advanced → Content → JavaScript Options → User JavaScript Folder.
   2. Chose what will be your userscripts folder.
2. Save the 4chan X file into your userscripts folder.

1. If you haven't set your userscripts folder:
   1. Enter opera:config in the address bar.
   2. Under User Prefs, enable User JavaScript.
   3. Set User JavaScript File to what will be your userscripts folder, /sdcard/js for example
   4. Save your settings.
2. Save the 4chan X file into your userscripts folder.

• Enhancing
  • Archive Redirection for 404'd Threads
  • Customizable Keybinds
  • Time Localization + Custom Formatting
  • Report Button
  • Comment & Thread Expansion
  • Index & Reply Navigation
• Filtering
  • Anonymizer
  • Regular Expressions Based Filter
  • Thread & Reply Hiding
  • Optional Stubs
• Imaging
  • Auto-Gif
  • Image Expansion
  • Image Fit: Full, Width, Height or Screen
  • Image Reload on Loading Error
  • Image Hover
  • Customizable Sauce Links
  • Reveal Spoilers
• Monitoring
  • Thread Updater
  • Scrolling onto New Posts
  • Unread Count with Favicon Indicator
  • Post In Title
  • Thread Stats
  • Thread Watcher
  • Auto Watch on Thread Creation & Reply
• Posting
  • Quick Reply
  • Image and Text Dumping
  • Multiple File Selection, Drag and Drop Files and Thumbnails
  • Thread Creation with Auto-Noko
  • Detect and Prevent Upload Failures
  • Automatic Quote from Text Selection
  • Auto-Hide
  • Cooldown
  • Toggle Auto-Posting by rying to submit during a Cooldown
  • Captcha Caching with Shift + Enter
  • Captcha Reloading on Backspace
  • Persistent QR
• Quoting
  • Quote Backlinks + Custom Formatting
  • Quote Inline
  • Quote Preview
  • Quote Highlighting
  • Indicate OP Quotes
  • Indicate Cross-thread Quotes

Before making one,

1. Make sure your browser & 4chan X are up to date.
2. Disable your other extensions & scripts.
3. If your issue persists, report precise steps to reproduce and console errors, if any. Open your console with:
   • Ctrl + Shift + J on Chrome & Firefox
   • Ctrl + Shift + O on Opera.

• Clearing your 4chan cookies will erase your settings!

• 4chan X only runs on 4chan! Chrome will say that it runs on all domains due to its match patterns.

• Greasemonkey is bugged, use Scriptish instead.
• If you get an error stating localStorage is null, go to about:config and enable dom.storage.enabled.
• If you get a Security error, make sure cookies are enabled.
• If Linkify Plus does not work with 4chan X, make sure to use Scriptish and edit Linkify Plus by adding // @delay 1 in its metadata block.

GitHub Issues Tracker

4chan X CSS defaults: Advanced styling features.
Userstyles.org: For 4chan userstyles.

Linkify Plus or 4chan Linkify: Linkification.
YouTube Link Title: YouTube title and embedding.
ExSauce: Exhentai sauce links.

DownThemAll for Firefox: download all images in a thread with this fast filter: /^http://images.4chan.org/.
*nix: Download all images in a thread with this shell function (add it to your .bashrc):

dta() {
  wget -O - $1 |
  grep -Eo 'images.4chan.org/[^"]+' |
  uniq |
  xargs wget
}