Examine source code of Open in Safari

{
  "name": "Open in Safari",
  "description": "Open current page, link, or all tabs in the Safari browser.",
  "version": "0.2.1",
  "manifest_version": 2,
  "permissions": [
    "storage",
    "tabs",
    "contextMenus",
    "nativeMessaging"
  ],
  "optional_permissions": [
    "downloads"
  ],
  "background": {
    "persistent": false,
    "scripts": [
      "config.js",
      "common.js"
    ]
  },
  "storage": {
    "managed_schema": "schema.json"
  },
  "homepage_url": "https://add0n.com/open-in.html?from=safari",
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png",
    "256": "data/icons/256.png",
    "512": "data/icons/512.png"
  },
  "browser_action": {},
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "data/inject.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "options_ui": {
    "page": "data/options/index.html",
    "chrome_style": true,
    "open_in_tab": true
  }
}