Examine source code of Prompt Manager

{
  "manifest_version": 3,
  "name": "Prompt Manager",
  "version": "2.4.1",
  "description": "Organize, search, and reuse AI prompts locally. Insert into Gemini, ChatGPT, or Claude.",
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "clipboardWrite",
    "contextMenus"
  ],
  "host_permissions": [
    "https://gemini.google.com/*",
    "https://chatgpt.com/*",
    "https://chat.openai.com/*",
    "https://claude.ai/*"
  ],
  "action": {
    "default_title": "Prompt Manager",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "options_page": "options/options.html",
  "background": {
    "service_worker": "scripts/background.js",
    "type": "module",
    "scripts": [
      "scripts/background-firefox.js"
    ]
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+P",
        "mac": "Command+Shift+P"
      },
      "description": "Open Prompt Manager"
    },
    "save_selection": {
      "suggested_key": {
        "default": "Ctrl+Shift+S",
        "mac": "Command+Shift+S"
      },
      "description": "Save selected text as a prompt"
    },
    "copy_selected_prompt": {
      "suggested_key": {
        "default": "Ctrl+Shift+C",
        "mac": "Command+Shift+C"
      },
      "description": "Copy the selected prompt"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://gemini.google.com/*",
        "https://chatgpt.com/*",
        "https://chat.openai.com/*",
        "https://claude.ai/*"
      ],
      "js": [
        "utils/gemini.js",
        "scripts/content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "Bangla.ttf"
      ],
      "matches": [
        "https://gemini.google.com/*",
        "https://chatgpt.com/*",
        "https://chat.openai.com/*",
        "https://claude.ai/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "prompt-manager@jonisarkar.local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  }
}