Examine source code of Webpage Sidebar

{
  "manifest_version": 2,
  "name": "Webpage Sidebar",
  "version": "0.1.1",
  "description": "Opens websites on sidebar managed on addon popup button",
  "icons": {
    "32": "/icon/icon-32.png",
    "48": "/icon/icon-48.png",
    "64": "/icon/icon-64.png"
  },
  "applications": {
    "gecko": {
      "id": "webpage_sidebar@sftblw.moe"
    }
  },
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "/background/storage.js"
    ]
  },
  "browser_action": {
    "default_icon": "/icon/icon-48.png",
    "default_title": "Webpage Sidebar Adder",
    "default_popup": "/launcher/launcher.html",
    "browser_style": true
  },
  "sidebar_action": {
    "default_icon": "/icon/icon-48.png",
    "default_title": "Webpage Sidebar Viewer",
    "default_panel": "/sidebar/sidebar.html"
  }
}