Examine source code of Fundit

{
  "manifest_version": 2,
  "name": "Fundit",
  "version": "0.2resigned1",
  "description": "Experimental way to fund websites",
  "icons": {
    "256": "assets/icons/fundit.png"
  },
  "applications": {
    "gecko": {
      "id": "{ba2fe0e8-0912-11e9-b970-a7554876b672}",
      "strict_min_version": "60.0"
    }
  },
  "permissions": [
    "*://fundit.corujas.net/*",
    "storage",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "assets/icons/fundit.png",
    "default_title": "Fund this site",
    "default_popup": "src/popup.html"
  }
}