Examine source code of Privacy Hitman

{
  "manifest_version": 2,
  "name": "Privacy Hitman",
  "version": "2.0",
  "description": "Extension for clearing history, cache, bookmarks, and managing tabs",
  "permissions": [
    "storage",
    "history",
    "browsingData",
    "bookmarks",
    "tabs",
    "management"
  ],
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "clear-history": {
      "suggested_key": {
        "default": "Ctrl+Alt+1"
      },
      "description": "Clear history"
    },
    "clear-cache": {
      "suggested_key": {
        "default": "Ctrl+Alt+2"
      },
      "description": "Clear cache"
    },
    "clear-bookmarks": {
      "suggested_key": {
        "default": "Ctrl+Alt+3"
      },
      "description": "Clear bookmarks"
    },
    "clear-passwords": {
      "suggested_key": {
        "default": "Ctrl+Alt+4"
      },
      "description": "Clear passwords and form data"
    },
    "full-cleanup": {
      "suggested_key": {
        "default": "Ctrl+Alt+5"
      },
      "description": "Full cleanup"
    },
    "open-tab": {
      "suggested_key": {
        "default": "Ctrl+Alt+6"
      },
      "description": "Open tabs"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "applications": {
    "gecko": {
      "id": "browser-cleaner@example.com"
    }
  }
}