Examine source code of 5ch KISS

{
  "manifest_version": 2,
  "name": "5ch KISS",
  "version": "4resigned1",
  "author": "ねこみみ♀",
  "description": "5ch KISS Viewer (まずは、外部サイトのリンク先に直接ジャンプ出来るようにします。)",
  "icons": {
    "320": "image/5chKISS.png"
  },
  "permissions": [
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "image/5ch.png",
    "default_title": "5ch KISS"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.5ch.net/*",
        "*://*.bbspink.com/*"
      ],
      "js": [
        "filter.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{42618c95-0e36-46bc-aaf6-3c2699dab46a}"
    }
  }
}