Examine source code of Liberapay Everywhere

{
  "manifest_version": 2,
  "name": "Liberapay Everywhere",
  "version": "0.1.2resigned1",
  "description": "The official Liberapay addon for your browser, we enable Liberapay tipping icons on many of your favorite sites.",
  "icons": {
    "48": "icons/icon-yellow-48.png",
    "96": "icons/icon-yellow-96.png"
  },
  "page_action": {
    "default_icon": "icons/icon-yellow-32.png",
    "default_title": "Liberapay Everywhere"
  },
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "webextension-polyfill.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1a049c3e-6608-4cf3-b2c1-abb5cea4f254}"
    }
  }
}