Examine source code of Send To Hydrus

{
  "$schema": "https://json.schemastore.org/chrome-manifest",
  "description": "Adds the option to send content to Hydrus.",
  "manifest_version": 2,
  "author": "tasadar2",
  "name": "Send To Hydrus",
  "version": "1.0.3",
  "homepage_url": "https://github.com/tasadar2/send-to-hydrus",
  "applications": {
    "gecko": {
      "id": "{14854a63-5ddd-49e5-9b20-0fe614649d2f}"
    }
  },
  "icons": {
    "32": "assets/hydrus.svg",
    "48": "assets/hydrus.svg",
    "96": "assets/hydrus.svg",
    "128": "assets/hydrus.svg"
  },
  "permissions": [
    "activeTab",
    "menus",
    "downloads",
    "downloads.open",
    "storage",
    "unlimitedStorage",
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "send-to-hydrus.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "jquery.js",
        "handler.js"
      ],
      "css": [
        "handler.css"
      ]
    },
    {
      "matches": [
        "*://*/*"
      ],
      "all_frames": true,
      "match_about_blank": true,
      "js": [
        "tagger.js"
      ],
      "css": [
        "tagger.css"
      ]
    }
  ],
  "commands": {
    "save-to-hydrus": {
      "suggested_key": {
        "default": "Alt+Shift+H"
      }
    }
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true,
    "chrome_style": true
  }
}