Examine source code of Zamu

{
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "0.10.12",
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "default_locale": "en",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@zamu.com",
      "strict_min_version": "110.0"
    }
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "http://*/*",
    "https://*/*",
    "storage",
    "activeTab",
    "scripting",
    "cookies",
    "management"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "/assets/get_started16.png",
      "32": "/assets/get_started32.png",
      "64": "/assets/get_started64.png",
      "128": "/assets/get_started128.png"
    }
  },
  "icons": {
    "16": "/assets/get_started16.png",
    "32": "/assets/get_started32.png",
    "64": "/assets/get_started64.png",
    "128": "/assets/get_started128.png"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "match_about_blank": false,
      "all_frames": false,
      "js": [
        "js/imperial.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "http://*.zamu.com/*",
        "https://*.zamu.com/*",
        "http://*.zamu.fr/*",
        "https://*.zamu.fr/*",
        "http://*.zamu.de/*",
        "https://*.zamu.de/*"
      ],
      "match_about_blank": false,
      "all_frames": false,
      "js": [
        "js/zamu.js"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    "css/cashback.css",
    "js/cashback.css",
    "css/options.css",
    "css/coupon.css",
    "css/popup.css",
    "js/coupon.js",
    "assets/*",
    "assets/**/*",
    "assets/fonts/*.*"
  ]
}