Examine source code of Easy Proxy

{
  "name": "__MSG_extension_name__",
  "description": "__MSG_extension_description__",
  "version": "3.2.0",
  "manifest_version": 2,
  "permissions": [
    "proxy",
    "storage",
    "tabs",
    "unlimitedStorage",
    "webNavigation",
    "webRequest",
    "http://*/*",
    "https://*/*"
  ],
  "default_locale": "en",
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "background": {
    "scripts": [
      "libs/easyproxy.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "24": "icons/24.png"
    },
    "default_popup": "pages/popup/popup.html"
  },
  "options_ui": {
    "page": "pages/options/options.html",
    "open_in_tab": true
  },
  "commands": {
    "_execute_browser_action": {}
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "firefox@easyproxy",
      "strict_min_version": "91.1.0"
    }
  },
  "developer": {
    "name": "jc3213",
    "url": "https://github.com/jc3213/easy_proxy"
  }
}