Examine source code of Social Helpers

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "2.1.2",
  "homepage_url": "https://github.com/jhonatasrm/social-helpers",
  "default_locale": "en",
  "author": "Jhonatas Machado",
  "applications": {
    "gecko": {
      "id": "social-helpers@jhonatasrm.com",
      "strict_min_version": "57.0"
    }
  },
  "icons": {
    "48": "res/icons/icon.png",
    "96": "res/icons/icon@2x.png"
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "../res/icons/social_helpers-16.png",
      "32": "../res/icons/social_helpers-32.png"
    },
    "default_title": "__MSG_extensionName__",
    "default_popup": "../html/popup.html"
  },
  "background": {
    "scripts": [
      "/js/popup.js"
    ]
  },
  "permissions": [
    "tabs",
    "storage",
    "activeTab"
  ]
}