Double-click Image Downloader

manifest.json

{
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "jid1-xgtdawe3yyUeBQ@jetpack"
    }
  },
  "name": "Double-click Image Downloader",
  "short_name": "DID",
  "version": "7.1.2",
  "description": "Double-click any image to download it quickly and quietly, or use the Hover Button.",
  "author": "[email protected]",
  "icons": {
    "16": "images/icon-16.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "notifications",
    "storage",
    "tabs",
    "downloads",
    "downloads.open",
    "<all_urls>",
    "contextMenus"
  ],
  "web_accessible_resources": [
    "images/download_on_alt1.png",
    "images/download_on_original.png",
    "images/download_off_alt1.png",
    "images/download_off_original.png"
  ],
  "commands": {
    "download-focused": {
      "suggested_key": {
        "default": "Alt+Shift+D"
      },
      "description": "Download the hovered image."
    }
  }
}