Examine source code of Outline Sidebar

{
  "name": "__MSG_extName__",
  "version": "1.0.3resigned1",
  "description": "__MSG_extDesc__",
  "permissions": [
    "tabs",
    "<all_urls>"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "img/16.png",
    "default_title": "__MSG_extName__"
  },
  "default_locale": "en",
  "icons": {
    "16": "img/16.png",
    "48": "img/48.png",
    "128": "img/128.png"
  },
  "web_accessible_resources": [
    "ui/low_contrast_linen.png"
  ],
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{7e32dc48-423a-433a-a3e3-14f9a831fbd7}"
    }
  }
}