Examine source code of No Color

{
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "{ae443e4d-02db-4eef-bcc2-0f1b17edb941}"
    }
  },
  "description": "__MSG_extensionDescription__",
  "name": "__MSG_extensionName__",
  "version": "0.9.5resigned1",
  "homepage_url": "https://addons.mozilla.org/firefox/addon/no-color/",
  "default_locale": "en",
  "icons": {
    "48": "/icons/icon-bw.svg",
    "96": "/icons/icon-bw-large.svg"
  },
  "background": {
    "scripts": [
      "/background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "/icons/icon.svg",
      "19": "/icons/icon.svg",
      "32": "/icons/icon.svg",
      "38": "/icons/icon.svg"
    },
    "browser_style": true
  },
  "options_ui": {
    "page": "/options/options.html"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ]
}