Examine source code of PlayThis

{
  "manifest_version": 2,
  "name": "PlayThis",
  "description": "PlayThis context menu, send/add video urls to PlayThis add-on in Kodi for resolving and playback",
  "version": "0.2.2.1resigned1",
  "default_locale": "en",
  "icons": {
    "16": "images/icon_16.png",
    "48": "images/icon_48.png",
    "128": "images/icon_128.png"
  },
  "applications": {
    "gecko": {
      "id": "playthis@anxdpanic",
      "strict_min_version": "53.0a2"
    }
  },
  "options_ui": {
    "page": "/html/settings.html",
    "browser_style": false
  },
  "browser_action": {
    "default_icon": {
      "19": "images/icon_19.png",
      "38": "images/icon_38.png"
    },
    "default_popup": "html/settings.html",
    "browser_style": false
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "permissions": [
    "contextMenus",
    "storage"
  ]
}