Examine source code of jetzt

{
  "manifest_version": 2,
  "name": "jetzt",
  "description": "Speed Reading",
  "version": "2.0.0",
  "homepage_url": "https://ds300.github.io/jetzt",
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "file:///*"
      ],
      "css": [
        "jetzt.css"
      ],
      "js": [
        "modules/preamble.js",
        "modules/helpers.js",
        "modules/config.js",
        "modules/themes.js",
        "modules/parse.js",
        "modules/exec.js",
        "modules/view.js",
        "modules/select.js",
        "modules/control.js",
        "modules/init.js",
        "chrome-config.js"
      ],
      "all_frames": true
    }
  ],
  "permissions": [
    "storage",
    "activeTab",
    "contextMenus"
  ],
  "icons": {
    "16": "img/icon16.png",
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "19": "img/icon19.png",
      "38": "img/icon38.png"
    },
    "default_title": "speed-read with jetzt"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "options/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7902ad20-1f1a-4551-bc14-578badd0d906}"
    }
  }
}