Examine source code of Scrolllink

{
  "manifest_version": 2,
  "default_locale": "en",
  "name": "Scrolllink",
  "version": "0.4.3",
  "description": "__MSG_extensionDescription__",
  "developer": {
    "name": "Cellabyte Team"
  },
  "applications": {
    "gecko": {
      "id": "scrolllink@cellabyte.com",
      "strict_min_version": "52.0a1"
    }
  },
  "homepage_url": "https://www.cellabyte.ru",
  "icons": {
    "16": "icons/slll-browser-blue-16-1.png",
    "32": "icons/slll-browser-blue-32-1.png",
    "48": "icons/slll-browser-blue-48-1.png",
    "64": "icons/slll-browser-blue-64-1.png",
    "96": "icons/slll-browser-blue-96-1.png",
    "128": "icons/slll-browser-blue-128-1.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "icons/slll-browser-button-16-1.png",
      "32": "icons/slll-browser-button-32-1.png"
    },
    "default_title": "__MSG_backgroundButtonToolbarText__"
  },
  "page_action": {
    "browser_style": true,
    "default_icon": {
      "19": "icons/slll-page-gray-19-1.png",
      "38": "icons/slll-page-gray-38-1.png"
    },
    "default_title": "__MSG_backgroundButtonOmniboxText__"
  },
  "options_ui": {
    "browser_style": true,
    "page": "options/options.html"
  },
  "permissions": [
    "tabs",
    "contextMenus",
    "https://scrolllink.cellabyte.ru/*",
    "notifications",
    "storage"
  ]
}