Examine source code of Highlight

{
  "manifest_version": 3,
  "name": "Highlight",
  "version": "2.3.1",
  "description": "Highlight word lists with colors, tooltips, notifications, folders, combination rules, and stale-page alerts.",
  "permissions": [
    "storage",
    "notifications",
    "contextMenus"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Highlight"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "highlight@highlight-mxm",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "background": {
    "scripts": [
      "storage.js",
      "i18n.js",
      "background.js"
    ]
  },
  "commands": {
    "hlx-toggle-pause-global": {
      "suggested_key": {
        "default": "Ctrl+Shift+H",
        "mac": "Command+Shift+H"
      },
      "description": "Highlight: Pause/resume all lists (every tab)"
    },
    "hlx-toggle-pause-tab": {
      "suggested_key": {
        "default": "Ctrl+Shift+G",
        "mac": "Command+Shift+G"
      },
      "description": "Highlight: Pause/resume this tab only"
    },
    "hlx-nav-next-match": {
      "suggested_key": {
        "default": "Ctrl+Shift+Down",
        "mac": "Command+Shift+Down"
      },
      "description": "Highlight: Jump to next match (active list)"
    },
    "hlx-nav-prev-match": {
      "suggested_key": {
        "default": "Ctrl+Shift+Up",
        "mac": "Command+Shift+Up"
      },
      "description": "Highlight: Jump to previous match (active list)"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "match_origin_as_fallback": true,
      "js": [
        "storage.js",
        "i18n.js",
        "sound.js",
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "sounds/*.mp3",
        "fonts/*.woff2"
      ],
      "matches": [
        "<all_urls>"
      ]
    },
    {
      "resources": [
        "content.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}