Examine source code of Mudcat Browser Tools

{
  "manifest_version": 2,
  "name": "Mudcat Browser Tools",
  "description": "Adds features to Mudcat pages. \nSee Description in Preferences/Options for more details.",
  "version": "2.6.3",
  "author": "DaveRo",
  "applications": {
    "gecko": {
      "id": "mudcat_browse_tools@davero.addons.mozilla.org"
    }
  },
  "browser_specific_settings": {
    "gecko_android": {},
    "gecko": {
      "id": "mudcat_browse_tools@davero.addons.mozilla.org"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.mudcat.org/*"
      ],
      "js": [
        "mudcat_origin_check.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://*.mudcat.org/",
        "*://*.mudcat.org/?*",
        "*://*.mudcat.org/index.cfm*",
        "*://*.mudcat.org/threads.cfm*"
      ],
      "js": [
        "mudcat_italicize_new_posts.user.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "*://*.mudcat.org/thread.cfm?thread*"
      ],
      "js": [
        "mudcat_next_unread.user.js",
        "mudcat_archiver.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "*://*.mudcat.org/thread.cfm?thread*",
        "*://*.mudcat.org/ThreadNewMess-Sub.cfm",
        "*://*.mudcat.org/newmess.cfm",
        "*://*.mudcat.org/NewMess-Sub.cfm"
      ],
      "js": [
        "mudcat_username.user.js",
        "mudcat_buttons.js",
        "store_textarea.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "*://*.mudcat.org/NewMessage.cfm*",
        "*://*.mudcat.org/ProcessNewMessage.cfm"
      ],
      "js": [
        "mudcat_buttons.js",
        "store_textarea.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "background": {
    "scripts": [
      "index.js"
    ],
    "persistent": true
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "*://*.mudcat.org/*",
    "storage",
    "webNavigation"
  ],
  "optional_permissions": [
    "nativeMessaging"
  ],
  "icons": {
    "128": "mudcat128.png"
  }
}