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"
  ]
}