Examine source code of MultiPass

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "short_name": "MultiPass",
  "description": "__MSG_extDescription__",
  "homepage_url": "http://gilles.crettenand.info/MultiPass/",
  "version": "0.9.1",
  "default_locale": "en",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_icon": {
      "19": "icons/icon-19.png",
      "38": "icons/icon-38.png"
    },
    "default_popup": "popin.html"
  },
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "background": {
    "scripts": [
      "js/extension.js"
    ],
    "persistent": true
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "applications": {
    "gecko": {
      "id": "multipass@gilles.crettenand.info",
      "strict_min_version": "49.0"
    }
  }
}