Examine source code of Memeflag delouser

{
  "name": "Memeflag delouser",
  "version": "1.3",
  "manifest_version": 2,
  "description": "This extension automatically hides and marks posters who use memeflags when posting to hide their country of origin.",
  "homepage_url": "https://github.com/DelouseMemeFlags/MemeflagDelouser",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "default_locale": "en",
  "permissions": [
    "http://*.4chan.org/*",
    "https://*.4chan.org/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*.4chan.org/*",
        "https://*.4chan.org/*"
      ],
      "css": [
        "src/inject/inject.css"
      ]
    },
    {
      "matches": [
        "http://*.4chan.org/*",
        "https://*.4chan.org/*"
      ],
      "js": [
        "src/inject/inject.js"
      ]
    }
  ]
}