Examine source code of Image Picker for OBS

{
  "manifest_version": 3,
  "name": "Image Picker for OBS",
  "version": "1.3.0",
  "description": "Pick images from any web page and send them straight to OBS.",
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "contextMenus"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "obs-image-picker@ceddini",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Image Picker for OBS",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png"
    }
  },
  "commands": {
    "pick-image": {
      "suggested_key": {
        "default": "Ctrl+Shift+1"
      },
      "description": "Pick an image to send to OBS"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}