Examine source code of EasyStartPage

{
  "manifest_version": 2,
  "name": "StartPage",
  "short_name": "StartPage",
  "version": "0.1.2",
  "description": "StartPage Plugin for Firefox that uses your bookmarks. Customizable with CSS.",
  "homepage_url": "https://github.com/metric-dt/startpage",
  "developer": {
    "name": "Derick Tseng",
    "url": "https://github.com/metric-dt"
  },
  "permissions": [
    "bookmarks",
    "storage"
  ],
  "browser_action": {
    "default_title": "StartPage",
    "browser_style": false
  },
  "omnibox": {
    "keyword": "!"
  },
  "background": {
    "page": "src/index.html"
  },
  "options_ui": {
    "page": "src/settings/settings.html",
    "open_in_tab": true
  },
  "chrome_url_overrides": {
    "newtab": "src/index.html"
  },
  "chrome_settings_overrides": {
    "homepage": "src/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "startpage@dericktseng.addons.mozilla.org"
    }
  }
}