Examine source code of Automatic Reader View

{
  "manifest_version" : 2 ,
  "name" : "Automatic Reader View",
  "version" : "1.0.3resigned1",
  "description" : "Automatically load webpages in Firefox's Reader View – as the default for the websites you specify.",
  "homepage_url" : "https://addons.mozilla.org/en-US/firefox/addon/automatic-reader-view/",
  "author": "Paul Morris",
  "applications": {
    "gecko": {
      "id": "@automatic-reader-view",
      "strict_min_version": "58.0"
    }
  },
  "icons" : {
    "32" : "icons/automatic-reader-view-32x32.png",
    "64" : "icons/automatic-reader-view-64x64.png"
  },
  "options_ui" : {
    "page": "options/options.html" 
  },
  "background" : {
    "scripts" : [
      "background.js" 
    ]
  },
  "permissions" : [
    "tabs" ,
    "storage" 
  ]
}