Examine source code of Estlex plugin

{
  "name": "Estlex",
  "version": "1.1",
  "description": "Õigusinfosüsteem",
  "author": "Estlex OÜ",
  "permissions": [
    "tabs",
    "activeTab",
    "storage",
    "contextMenus",
    "https://estlex.ee/"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "background": {
    "scripts": [
      "js/app/config.js",
      "js/app/connector.js",
      "js/app/background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_title": "Estlex",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/estlex-16.png",
      "25": "images/estlex-25.png",
      "32": "images/estlex-32.png",
      "48": "images/estlex-48.png",
      "128": "images/estlex-128.png"
    }
  },
  "icons": {
    "16": "images/estlex-16.png",
    "25": "images/estlex-25.png",
    "32": "images/estlex-32.png",
    "48": "images/estlex-48.png",
    "128": "images/estlex-128.png"
  },
  "manifest_version": 2,
  "content_scripts": [
    {
      "css": [
        "css/akt_extras_1.css"
      ],
      "js": [
        "js/page/akt_extra.js",
        "js/page/akt_kihid.js",
        "js/page/arutelu.js"
      ],
      "matches": [
        "https://www.riigiteataja.ee/akt/*",
        "https://www.riigiteataja.ee/en/eli/*"
      ]
    },
    {
      "js": [
        "js/page/estlex.js"
      ],
      "matches": [
        "https://estlex.ee/*"
      ]
    }
  ],
  "omnibox": {
    "keyword": "e"
  },
  "optional_permissions": [
    "*://*/*"
  ],
  "web_accessible_resources": [
    "images/akt_extra_menu_24.svg",
    "images/carousel.svg",
    "images/tolked_ico.png",
    "images/clipboard.svg",
    "images/star_selected_24.svg",
    "images/forum.svg",
    "images/kuula_loading.gif",
    "images/ICON_INFO.gif",
    "images/ICON_INFO3.gif",
    "images/ICON_RIGHTv3.gif",
    "images/ICON_LEFTv3.gif",
    "images/link.svg",
    "images/icon_plus.gif",
    "images/icon_minus.gif",
    "images/OTSINGLIST.svg",
    "images/NOTIFICMENU.svg",
    "images/NOTEMENU.svg",
    "images/FORUMMENU.svg",
    "images/LEMMIKMENU.svg",
    "images/ICONUSERN.png",
    "images/LOGOUTMENU.svg"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "moz-extension@estlex.ee"
    },
    "edge": {
      "browser_action_next_to_addressbar": true
    }
  }
}