Examine source code of Just Read

{
  "name": "__MSG_extName__",
  "version": "7.1.2",
  "manifest_version": 3,
  "default_locale": "en",
  "description": "__MSG_extDescription__",
  "homepage_url": "https://github.com/ZachSaucier/Just-Read",
  "action": {
    "default_icon": "icons/icon19.png",
    "default_title": "__MSG_extActionTitle__"
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "commands": {
    "open-just-read": {
      "suggested_key": {
        "default": "Ctrl+Shift+L"
      },
      "description": "__MSG_commandOpenJustRead__"
    },
    "select-text": {
      "suggested_key": {
        "default": "Ctrl+Shift+K"
      },
      "description": "__MSG_commandSelectText__"
    }
  },
  "background": {
    "scripts": [
      "shared/i18n.js",
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    {
      "matches": [
        "*://*/*"
      ],
      "resources": [
        "required-styles.css",
        "default-styles.css",
        "dark-styles.css",
        "hide-segments.css",
        "page.css",
        "options/*",
        "options.css",
        "fonts/*",
        "external-libraries/mathjax/tex-mml-chtml.js",
        "external-libraries/mathjax/safe.js",
        "external-libraries/mathjax/output/chtml/fonts/woff-v2/*"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "https://justread.link/*",
        "https://www.justread.link/*"
      ],
      "run_at": "document_start",
      "js": [
        "messager.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "contextMenus",
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "*://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{cb2b337b-99d7-4b86-aa04-84a6f5c3e218}",
      "strict_min_version": "115.0"
    }
  }
}