Examine source code of Better Justel

{
  "manifest_version": 3,
  "name": "Better Justel",
  "description": "Improves Belgian eJustice Justel website",
  "version": "0.4.2",
  "icons": {
    "16": "images/justice_scales_16.png",
    "32": "images/justice_scales_32.png",
    "48": "images/justice_scales_48.png",
    "128": "images/justice_scales_128.png"
  },
  "permissions": [
    "storage",
    "unlimitedStorage"
  ],
  "action": {
    "default_icon": {
      "16": "images/justice_scales_16.png",
      "24": "images/justice_scales_24.png",
      "32": "images/justice_scales_32.png"
    },
    "default_popup": "html/popup.html"
  },
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "content_scripts": [
    {
      "css": [
        "css/jstree.css",
        "css/mycss.css"
      ],
      "js": [
        "scripts/lib/download.js",
        "scripts/lib/Dropbox-sdk.min.js",
        "scripts/lib/jquery.min.js",
        "scripts/lib/jquery-ui.min.js",
        "scripts/lib/jquery-resizable.min.js",
        "scripts/lib/jstree.min.js",
        "scripts/lib/standalone-anchoring.js",
        "scripts/content-helpers.js",
        "scripts/content-analyse.js",
        "scripts/content-info.js",
        "scripts/content-display.js",
        "scripts/content-highlights.js",
        "scripts/content-caselaw.js",
        "scripts/content-dropbox.js",
        "scripts/content-search.js",
        "scripts/content.js"
      ],
      "matches": [
        "https://www.ejustice.just.fgov.be/cgi_*/loi_a1.pl*",
        "https://www.ejustice.just.fgov.be/cgi_*/article.pl*",
        "https://www.ejustice.just.fgov.be/cgi_*/rech.pl*",
        "https://www.ejustice.just.fgov.be/cgi_*/rech_res.pl*",
        "https://www.ejustice.just.fgov.be/cgi_*/list.pl*",
        "https://www.ejustice.just.fgov.be/eli/*",
        "https://www.ejustice.just.fgov.be/loi/loi.htm*"
      ],
      "run_at": "document_start"
    }
  ],
  "host_permissions": [
    "https://www.ejustice.just.fgov.be/eli/*"
  ],
  "optional_host_permissions": [
    "https://raw.githubusercontent.com/rafjaf/juportal_crawler/main/data/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "css/mycss.css",
        "html/offline.html",
        "html/caselaw-agreement.html",
        "images/fond5.jpg",
        "images/jstree_32px.png",
        "images/jstree_40px.png",
        "images/jstree_throbber.gif",
        "images/save.png",
        "scripts/util.js",
        "scripts/caselaw-agreement.js",
        "LICENSE"
      ],
      "matches": [
        "https://www.ejustice.just.fgov.be/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b10df66f-7b07-4f1d-b6f4-1c7cd883d8b7}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "browsingActivity",
          "websiteContent",
          "websiteActivity"
        ]
      }
    }
  }
}