Examine source code of ContribsToday

{
  "manifest_version": 2,
  "name": "ContribsToday",
  "version": "1.0",
  "description": "Firefox Extension that displays how many contributions you made today on Github.",
  "permissions": [
    "*://api.github.com/*",
    "storage",
    "tabs"
  ],
  "options_page": "options.html",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_title": "Open Profile"
  },
  "icons": {
    "128": "icons/default-icon-128px.png"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{edfb26b2-d01a-4665-a1a0-cc3ea8fa5a96}"
    }
  }
}