Examine source code of Filestage

{
  "manifest_version": 2,
  "version": "1.0.6",
  "default_locale": "en",
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "icons": {
    "16": "icon_16.png",
    "48": "icon_48.png",
    "128": "icon_128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://app.filestage.io/*",
        "*://*.private.filestage.io/*",
        "https://localhost/*"
      ],
      "exclude_matches": [
        "https://media.private.filestage.io/*",
        "https://media.filestage.io/*"
      ],
      "js": [
        "content-script.js"
      ],
      "all_frames": false
    }
  ],
  "browser_action": {
    "default_icon": {
      "16": "icon_16.png",
      "48": "icon_48.png",
      "128": "icon_128.png"
    },
    "default_title": "__MSG_appName__"
  },
  "permissions": [
    "<all_urls>",
    "webRequest",
    "webRequestBlocking",
    "activeTab"
  ],
  "commands": {
    "switch-mode": {
      "suggested_key": {
        "default": "Alt+C"
      },
      "description": "Switch between comment and browse mode"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9aee7c96-c1c8-4578-b070-310dd6b87cde}"
    }
  }
}