Examine source code of Click and Read

{
  "manifest_version": 3,
  "name": "Click and Read CNRS",
  "description": "__MSG_extDescription__",
  "version": "4.5.1",
  "short_name": "C&R",
  "icons": {
    "16": "icons/16x16.png",
    "20": "icons/20x20.png",
    "32": "icons/32x32.png",
    "40": "icons/40x40.png",
    "48": "icons/48x48.png",
    "64": "icons/64x64.png",
    "128": "icons/128x128.png",
    "256": "icons/256x256.png",
    "512": "icons/512x512.png",
    "1024": "icons/1024x1024.png"
  },
  "action": {},
  "homepage_url": "https://clickandread.inist.fr",
  "default_locale": "fr",
  "permissions": [
    "scripting",
    "storage",
    "webNavigation",
    "notifications"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "incognito": "spanning",
  "browser_specific_settings": {
    "gecko": {
      "id": "inist.users@gmail.com",
      "strict_min_version": "112.0"
    }
  },
  "background": {
    "type": "module",
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "open_in_tab": true,
    "browser_style": true,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": false,
      "run_at": "document_idle",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "content-scripts/content.css"
      ],
      "use_dynamic_url": true,
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}