Examine source code of Pixcall

{
  "manifest_version": 2,
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "version": "2.2.4",
  "default_locale": "en",
  "icons": {
    "48": "img/logo-48.png",
    "96": "img/logo-96.png",
    "128": "img/logo-128.png",
    "256": "img/logo-256.png"
  },
  "background": {
    "scripts": [
      "assets/background.js"
    ]
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+P",
        "mac": "MacCtrl+Shift+P"
      },
      "description": "__MSG_openApp__"
    },
    "capture-area": {
      "suggested_key": {
        "default": "Alt+Shift+1"
      },
      "description": "__MSG_captureArea__"
    },
    "capture-viewport": {
      "suggested_key": {
        "default": "Alt+Shift+2"
      },
      "description": "__MSG_captureViewport__"
    },
    "capture-full-page": {
      "suggested_key": {
        "default": "Alt+Shift+3"
      },
      "description": "__MSG_captureFullPage__"
    },
    "capture-html": {
      "description": "__MSG_captureHTML__"
    }
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "assets/content.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": "script-src 'self';  object-src 'self';",
  "browser_action": {
    "default_icon": {
      "16": "img/logo-16.png",
      "32": "img/logo-32.png",
      "64": "img/logo-64.png"
    }
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "storage",
    "scripting",
    "webRequest",
    "declarativeNetRequest",
    "<all_urls>"
  ],
  "web_accessible_resources": [
    "index.html",
    "disabled/*",
    "assets/*",
    "js/*",
    "css/*",
    "img/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7e5d2460-6d12-4e67-94d0-4ec761910f3f}",
      "strict_min_version": "55.0"
    }
  }
}