Examine source code of Bonsai

{
  "manifest_version": 2,
  "name": "Bonsai",
  "version": "0",
  "description": "Modifie l'affichage du site internet du Tribunal fédéral suisse. Icones par Kerismaker (www.flaticon.com/authors/kerismaker)",
  "icons": {
    "128": "icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "page_action": {
    "default_icon": "icon.png",
    "show_matches": [
      "*://*.bger.ch/*"
    ]
  },
  "web_accessible_resources": [
    "style.css",
    "content.js"
  ],
  "permissions": [
    "tabs",
    "activeTab",
    "contextMenus",
    "storage",
    "*://*.bger.ch/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{cf129c1f-a10d-490a-a113-942d3c398523}"
    }
  }
}