Examine source code of BulkPicBridge

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "1.1.2",
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png"
  },
  "default_locale": "en",
  "homepage_url": "https://bulkpictools.com",
  "permissions": [
    "contextMenus",
    "tabs",
    "alarms",
    "storage",
    "sidePanel",
    "<all_urls>"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "bulkpic-bridge@bulkpictools.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "BulkPic Bridge",
    "default_popup": "popup.html"
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_title": "BulkPic Bridge"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}