Examine source code of Bulk Image Downloader

{
  "name": "Bulk Image Downloader",
  "manifest_version": 2,
  "description": "Integrates Bulk Image Downloader (a Windows only app that must be installed separately) with FireFox",
  "version": "5.95.0.0",
  "background": {
    "scripts": [
      "eventPage.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "{524B8EF8-C312-11DB-8039-536F56D89593}",
      "strict_min_version": "50.0"
    }
  },
  "icons": {
    "16": "bid_16x.png",
    "48": "bid_48x.png"
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "tabs",
    "http://*/*",
    "https://*/*",
    "contextMenus",
    "nativeMessaging"
  ],
  "browser_action": {
    "default_title": "Open this page with BID",
    "default_icon": "bid_16x.png",
    "default_popup": "popup.html"
  },
  "web_accessible_resources": [
    "content_script.js",
    "content_scriptq.js",
    "content_scriptle.js",
    "content_scriptlinkq.js",
    "popup.js"
  ],
  "commands": {
    "bid-opencurrentpage": {
      "suggested_key": {
        "default": "Alt+Shift+C"
      },
      "description": "Open Current Page with BID"
    },
    "bid-enqueuecurrentpage": {
      "suggested_key": {
        "default": "Alt+Shift+Q"
      },
      "description": "Enqueue Current Page with BID"
    },
    "bid-linkexplorer": {
      "suggested_key": {
        "default": "Alt+Shift+X"
      },
      "description": "Open Current Page with BID Link Explorer"
    }
  }
}