Examine source code of SideApp For Vimeo

{
  "name": "SideApp For Vimeo",
  "description": "SideApp For Vimeo",
  "permissions": [
    "storage",
    "tabs"
  ],
  "version": "1.1.0.26resigned1",
  "applications": {
    "gecko": {
      "id": "sbfovi.ff@Scripty_via_The.UNITY.Empire",
      "strict_min_version": "42.0"
    }
  },
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_icon": "vimeo.png",
    "default_title": "SideApp for Vimeo"
  },
  "sidebar_action": {
    "default_icon": {
      "512": "vimeo.png"
    },
    "default_title": "Vimeo",
    "default_panel": "index.html"
  },
  "icons": {
    "512": "vimeo.png"
  },
  "manifest_version": 2
}