Chrome extension for 8ch.net mods
How to add extension: Download project and extract 8CH Mod X folder
Chrome > Tools > Settings > Extensions
Check "Developer mode" at the top and click Load unpacked extension
http://i.imgur.com/SiL3hP5.png
Locate extracted folder and press OK.
Posts will have an additional Checkbox by the mod controls. http://i.imgur.com/0keXSDL.png
Once you've selected the posts you want to delete, scroll to bottom of page and hit the delete button http://i.imgur.com/1uZwYSs.png