Examine source code of Lambda Hackerspace

{
  "manifest_version": 2,
  "name": "Lambda Hackerspace",
  "version": "0.7.1resigned1",
  "description": "Lambda space's information system. This WebExtension informs you about the status of the hackerspace and the upcoming events",
  "browser_action": {
    "default_icon": "icons/c_48x48.png",
    "default_title": "Lambda Hackerspace status!"
  },
  "background": {
    "scripts": [
      "MinisterIn.js",
      "eventData.js"
    ]
  },
  "permissions": [
    "*://*.lambdaspace.gr/*"
  ],
  "applications": {
    "gecko": {
      "id": "{c8048bf4-35f1-4cb8-bed3-6f2d1a556f31}",
      "strict_min_version": "45.0"
    }
  }
}