Examine source code of Allusion Web Clipper

{
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "ElementPicker.js",
        "content-script.js"
      ]
    }
  ],
  "browser_action": {
    "default_title": "Allusion",
    "default_popup": "popup.html",
    "browser_style": false
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+L",
        "mac": "Command+Shift+L"
      }
    },
    "pick-image": {
      "description": "Pick an image from the page to import into Allusion",
      "suggested_key": {
        "default": "Ctrl+Shift+1",
        "mac": "Command+Shift+1"
      }
    }
  },
  "manifest_version": 2,
  "name": "Allusion Web Clipper",
  "version": "1.2.1",
  "description": "Web Clipper for Allusion - for organizing your Visual Library",
  "icons": {
    "32": "favicon_32x32.png"
  },
  "permissions": [
    "contextMenus",
    "notifications",
    "activeTab",
    "storage",
    "http://localhost:5454/*",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{53735965-3e4d-4111-a8dc-7221abe194dc}"
    }
  }
}